641115624525655 has 4 divisors (see below), whose sum is σ = 769338749430792. Its totient is φ = 512892499620520.

The previous prime is 641115624525599. The next prime is 641115624525667. The reversal of 641115624525655 is 556525426511146.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 641115624525655 - 2¹⁵ = 641115624492887 is a prime.

It is a super-2 number, since 2×641115624525655² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641115624525655.

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, 64111562452561 + ... + 64111562452570.

It is an arithmetic number, because the mean of its divisors is an integer number (192334687357698).

Almost surely, 2^{641115624525655} is an apocalyptic number.

641115624525655 is a deficient number, since it is larger than the sum of its proper divisors (128223124905137).

641115624525655 is a wasteful number, since it uses less digits than its factorization.

641115624525655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128223124905136.

The product of its digits is 43200000, while the sum is 58.

The spelling of 641115624525655 in words is "six hundred forty-one trillion, one hundred fifteen billion, six hundred twenty-four million, five hundred twenty-five thousand, six hundred fifty-five".