61649954 has 4 divisors (see below), whose sum is σ = 92474934. Its totient is φ = 30824976.

The previous prime is 61649923. The next prime is 61649957. The reversal of 61649954 is 45994616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 12439729 = 7015^2 + 3527^2 .

It is not an unprimeable number, because it can be changed into a prime (61649957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15412487 + ... + 15412490.

Almost surely, 2^61649954 is an apocalyptic number.

61649954 is a deficient number, since it is larger than the sum of its proper divisors (30824980).

61649954 is a wasteful number, since it uses less digits than its factorization.

61649954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30824979.

The product of its digits is 233280, while the sum is 44.

The square root of 61649954 is about 7851.7484676981. The cubic root of 61649954 is about 395.0428923139.

The spelling of 61649954 in words is "sixty-one million, six hundred forty-nine thousand, nine hundred fifty-four".