61621751110775 has 12 divisors (see below), whose sum is σ = 76447133757792. Its totient is φ = 49274070320640.

The previous prime is 61621751110741. The next prime is 61621751110877. The reversal of 61621751110775 is 57701115712616.

It is not a de Polignac number, because 61621751110775 - 2²⁴ = 61621734333559 is a prime.

It is a super-2 number, since 2×61621751110775² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

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, 583210319 + ... + 583315968.

It is an arithmetic number, because the mean of its divisors is an integer number (6370594479816).

Almost surely, 2^{61621751110775} is an apocalyptic number.

61621751110775 is a deficient number, since it is larger than the sum of its proper divisors (14825382647017).

61621751110775 is a wasteful number, since it uses less digits than its factorization.

61621751110775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166528410 (or 1166528405 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 50.

The spelling of 61621751110775 in words is "sixty-one trillion, six hundred twenty-one billion, seven hundred fifty-one million, one hundred ten thousand, seven hundred seventy-five".