61799520 has 48 divisors (see below), whose sum is σ = 194670000. Its totient is φ = 16479744.

The previous prime is 61799503. The next prime is 61799561. The reversal of 61799520 is 2599716.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63895 + ... + 64854.

It is an arithmetic number, because the mean of its divisors is an integer number (4055625).

Almost surely, 2^61799520 is an apocalyptic number.

61799520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61799520 is an abundant number, since it is smaller than the sum of its proper divisors (132870480).

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

61799520 is a wasteful number, since it uses less digits than its factorization.

61799520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128767 (or 128759 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 61799520 is about 7861.2670734431. The cubic root of 61799520 is about 395.3620991941.

The spelling of 61799520 in words is "sixty-one million, seven hundred ninety-nine thousand, five hundred twenty".