61564617624 has 32 divisors (see below), whose sum is σ = 153919491120. Its totient is φ = 20520479616.

The previous prime is 61564617619. The next prime is 61564617637. The reversal of 61564617624 is 42671646516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510922 + ... + 619814.

Almost surely, 2^61564617624 is an apocalyptic number.

It is an amenable number.

61564617624 is an abundant number, since it is smaller than the sum of its proper divisors (92354873496).

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

61564617624 is a wasteful number, since it uses less digits than its factorization.

61564617624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132459 (or 132455 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The spelling of 61564617624 in words is "sixty-one billion, five hundred sixty-four million, six hundred seventeen thousand, six hundred twenty-four".