81260611995 has 16 divisors (see below), whose sum is σ = 130025182752. Its totient is φ = 43336258560.

The previous prime is 81260611981. The next prime is 81260612003. The reversal of 81260611995 is 59911606218.

It is not a de Polignac number, because 81260611995 - 2⁵ = 81260611963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87339 + ... + 412491.

It is an arithmetic number, because the mean of its divisors is an integer number (8126573922).

Almost surely, 2^81260611995 is an apocalyptic number.

81260611995 is a deficient number, since it is larger than the sum of its proper divisors (48764570757).

81260611995 is a wasteful number, since it uses less digits than its factorization.

81260611995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341822.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 81260611995 in words is "eighty-one billion, two hundred sixty million, six hundred eleven thousand, nine hundred ninety-five".