61567051624 has 64 divisors (see below), whose sum is σ = 132838952400. Its totient is φ = 26498617344.

The previous prime is 61567051621. The next prime is 61567051627. The reversal of 61567051624 is 42615076516.

It is an interprime number because it is at equal distance from previous prime (61567051621) and next prime (61567051627).

It can be written as a sum of positive squares in 8 ways, for example, as 43981639524 + 17585412100 = 209718^2 + 132610^2 .

It is not an unprimeable number, because it can be changed into a prime (61567051621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32974 + ... + 352450.

Almost surely, 2^61567051624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61567051624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66419476200).

61567051624 is an abundant number, since it is smaller than the sum of its proper divisors (71271900776).

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

61567051624 is a wasteful number, since it uses less digits than its factorization.

61567051624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319622 (or 319618 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 61567051624 in words is "sixty-one billion, five hundred sixty-seven million, fifty-one thousand, six hundred twenty-four".