61510656 has 44 divisors (see below), whose sum is σ = 163956512. Its totient is φ = 20502528.

The previous prime is 61510651. The next prime is 61510679. The reversal of 61510656 is 65601516.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61510651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6940 + ... + 13083.

Almost surely, 2^61510656 is an apocalyptic number.

It is an amenable number.

61510656 is an abundant number, since it is smaller than the sum of its proper divisors (102445856).

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

61510656 is a wasteful number, since it uses less digits than its factorization.

61510656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20046 (or 20028 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 61510656 is about 7842.8729429974. The cubic root of 61510656 is about 394.7451349537.

Adding to 61510656 its sum of digits (30), we get a triangular number (61510686 = T₁₁₀₉₁).

The spelling of 61510656 in words is "sixty-one million, five hundred ten thousand, six hundred fifty-six".