81126562101477 has 16 divisors (see below), whose sum is σ = 113123123337600. Its totient is φ = 51617662164992.

The previous prime is 81126562101437. The next prime is 81126562101479. The reversal of 81126562101477 is 77410126562118.

It is a cyclic number.

It is not a de Polignac number, because 81126562101477 - 2⁶ = 81126562101413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81126562101479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309264428 + ... + 1309326389.

It is an arithmetic number, because the mean of its divisors is an integer number (7070195208600).

Almost surely, 2^{81126562101477} is an apocalyptic number.

It is an amenable number.

81126562101477 is a deficient number, since it is larger than the sum of its proper divisors (31996561236123).

81126562101477 is a wasteful number, since it uses less digits than its factorization.

81126562101477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618591292.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 81126562101477 in words is "eighty-one trillion, one hundred twenty-six billion, five hundred sixty-two million, one hundred one thousand, four hundred seventy-seven".