81358054052510 has 32 divisors (see below), whose sum is σ = 147009212820000. Its totient is φ = 32417970387840.

The previous prime is 81358054052479. The next prime is 81358054052581. The reversal of 81358054052510 is 1525045085318.

It is a super-2 number, since 2×81358054052510² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 12369005 + ... + 17768184.

It is an arithmetic number, because the mean of its divisors is an integer number (4594037900625).

Almost surely, 2^{81358054052510} is an apocalyptic number.

81358054052510 is a deficient number, since it is larger than the sum of its proper divisors (65651158767490).

81358054052510 is a wasteful number, since it uses less digits than its factorization.

81358054052510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30138236.

The product of its (nonzero) digits is 960000, while the sum is 47.

The spelling of 81358054052510 in words is "eighty-one trillion, three hundred fifty-eight billion, fifty-four million, fifty-two thousand, five hundred ten".