61899552 has 240 divisors, whose sum is σ = 215151552. Its totient is φ = 17210880.

The previous prime is 61899527. The next prime is 61899559. The reversal of 61899552 is 25599816.

61899552 is a `hidden beast` number, since 6 + 1 + 8 + 99 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61899498 and 61899507.

It is not an unprimeable number, because it can be changed into a prime (61899559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 370573 + ... + 370739.

Almost surely, 2^61899552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61899552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107575776).

61899552 is an abundant number, since it is smaller than the sum of its proper divisors (153252000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61899552 is a wasteful number, since it uses less digits than its factorization.

61899552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 196 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 61899552 is about 7867.6268340587. The cubic root of 61899552 is about 395.5753022634.

The spelling of 61899552 in words is "sixty-one million, eight hundred ninety-nine thousand, five hundred fifty-two".