61915716 has 36 divisors (see below), whose sum is σ = 156753324. Its totient is φ = 20606400.

The previous prime is 61915691. The next prime is 61915739. The reversal of 61915716 is 61751916.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44275716 + 17640000 = 6654^2 + 4200^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37386 + ... + 39006.

It is an arithmetic number, because the mean of its divisors is an integer number (4354259).

Almost surely, 2^61915716 is an apocalyptic number.

It is an amenable number.

61915716 is an abundant number, since it is smaller than the sum of its proper divisors (94837608).

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

61915716 is a wasteful number, since it uses less digits than its factorization.

61915716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692 (or 2687 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 61915716 is about 7868.6540145059. The cubic root of 61915716 is about 395.6097318217.

The spelling of 61915716 in words is "sixty-one million, nine hundred fifteen thousand, seven hundred sixteen".