61657012152 has 48 divisors (see below), whose sum is σ = 167006537880. Its totient is φ = 20550024000.

The previous prime is 61657012127. The next prime is 61657012177. The reversal of 61657012152 is 25121075616.

61657012152 is a `hidden beast` number, since 6 + 16 + 570 + 1 + 21 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (61657012127) and next prime (61657012177).

It is a super-2 number, since 2×61657012152² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

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, 669627 + ... + 756117.

Almost surely, 2^61657012152 is an apocalyptic number.

It is an amenable number.

61657012152 is an abundant number, since it is smaller than the sum of its proper divisors (105349525728).

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

61657012152 is a wasteful number, since it uses less digits than its factorization.

61657012152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96404 (or 96397 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 61657012152 its reverse (25121075616), we get a palindrome (86778087768).

The spelling of 61657012152 in words is "sixty-one billion, six hundred fifty-seven million, twelve thousand, one hundred fifty-two".