2631111120561 has 64 divisors (see below), whose sum is σ = 4441324124160. Its totient is φ = 1345851279360.

The previous prime is 2631111120553. The next prime is 2631111120577. The reversal of 2631111120561 is 1650211111362.

It is not a de Polignac number, because 2631111120561 - 2³ = 2631111120553 is a prime.

It is a super-2 number, since 2×2631111120561² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2631111120541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4116150 + ... + 4712208.

It is an arithmetic number, because the mean of its divisors is an integer number (69395689440).

Almost surely, 2^{2631111120561} is an apocalyptic number.

2631111120561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2631111120561 is a deficient number, since it is larger than the sum of its proper divisors (1810213003599).

2631111120561 is a wasteful number, since it uses less digits than its factorization.

2631111120561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596374.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 2631111120561 in words is "two trillion, six hundred thirty-one billion, one hundred eleven million, one hundred twenty thousand, five hundred sixty-one".