261276012066156 has 24 divisors (see below), whose sum is σ = 636150290248704. Its totient is φ = 83305395151440.

The previous prime is 261276012066151. The next prime is 261276012066161. The reversal of 261276012066156 is 651660210672162.

It is an interprime number because it is at equal distance from previous prime (261276012066151) and next prime (261276012066161).

It is a junction number, because it is equal to n+sod(n) for n = 261276012066099 and 261276012066108.

It is not an unprimeable number, because it can be changed into a prime (261276012066151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473326108540 + ... + 473326109091.

It is an arithmetic number, because the mean of its divisors is an integer number (26506262093696).

Almost surely, 2^{261276012066156} is an apocalyptic number.

It is an amenable number.

261276012066156 is an abundant number, since it is smaller than the sum of its proper divisors (374874278182548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261276012066156 is a wasteful number, since it uses less digits than its factorization.

261276012066156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946652217661 (or 946652217659 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 261276012066156 in words is "two hundred sixty-one trillion, two hundred seventy-six billion, twelve million, sixty-six thousand, one hundred fifty-six".