155016561060631 has 4 divisors (see below), whose sum is σ = 161756411541552. Its totient is φ = 148276710579712.

The previous prime is 155016561060617. The next prime is 155016561060661. The reversal of 155016561060631 is 136060165610551.

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

It is a cyclic number.

It is not a de Polignac number, because 155016561060631 - 2¹⁵ = 155016561027863 is a prime.

It is a super-2 number, since 2×155016561060631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155016561060661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369925240426 + ... + 3369925240471.

It is an arithmetic number, because the mean of its divisors is an integer number (40439102885388).

Almost surely, 2^{155016561060631} is an apocalyptic number.

155016561060631 is a deficient number, since it is larger than the sum of its proper divisors (6739850480921).

155016561060631 is an equidigital number, since it uses as much as digits as its factorization.

155016561060631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739850480920.

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 155016561060631 in words is "one hundred fifty-five trillion, sixteen billion, five hundred sixty-one million, sixty thousand, six hundred thirty-one".