261615602626 has 64 divisors (see below), whose sum is σ = 462839021568. Its totient is φ = 108579901248.

The previous prime is 261615602623. The next prime is 261615602671. The reversal of 261615602626 is 626206516162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (261615602623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47537791 + ... + 47543293.

It is an arithmetic number, because the mean of its divisors is an integer number (7231859712).

Almost surely, 2^261615602626 is an apocalyptic number.

261615602626 is a deficient number, since it is larger than the sum of its proper divisors (201223418942).

261615602626 is a wasteful number, since it uses less digits than its factorization.

261615602626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 261615602626 in words is "two hundred sixty-one billion, six hundred fifteen million, six hundred two thousand, six hundred twenty-six".