61621752056 has 16 divisors (see below), whose sum is σ = 115782004800. Its totient is φ = 30746550784.

The previous prime is 61621752037. The next prime is 61621752079. The reversal of 61621752056 is 65025712616.

61621752056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61621752056² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8036585 + ... + 8044248.

It is an arithmetic number, because the mean of its divisors is an integer number (7236375300).

Almost surely, 2^61621752056 is an apocalyptic number.

It is an amenable number.

61621752056 is a deficient number, since it is larger than the sum of its proper divisors (54160252744).

61621752056 is a wasteful number, since it uses less digits than its factorization.

61621752056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16081318 (or 16081314 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 61621752056 in words is "sixty-one billion, six hundred twenty-one million, seven hundred fifty-two thousand, fifty-six".