81377650262 has 8 divisors (see below), whose sum is σ = 122085873000. Its totient is φ = 40682359264.

The previous prime is 81377650229. The next prime is 81377650271. The reversal of 81377650262 is 26205677318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3217187 + ... + 3242382.

It is an arithmetic number, because the mean of its divisors is an integer number (15260734125).

Almost surely, 2^81377650262 is an apocalyptic number.

81377650262 is a deficient number, since it is larger than the sum of its proper divisors (40708222738).

81377650262 is a wasteful number, since it uses less digits than its factorization.

81377650262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465870.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 81377650262 in words is "eighty-one billion, three hundred seventy-seven million, six hundred fifty thousand, two hundred sixty-two".