771997902234 has 32 divisors (see below), whose sum is σ = 1662965747520. Its totient is φ = 237509096832.

The previous prime is 771997902229. The next prime is 771997902271. The reversal of 771997902234 is 432209799177.

It is a super-2 number, since 2×771997902234² (a number of 25 digits) contains 22 as substring.

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, 55509 + ... + 1243815.

It is an arithmetic number, because the mean of its divisors is an integer number (51967679610).

Almost surely, 2^771997902234 is an apocalyptic number.

771997902234 is an abundant number, since it is smaller than the sum of its proper divisors (890967845286).

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

771997902234 is a wasteful number, since it uses less digits than its factorization.

771997902234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196654.

The product of its (nonzero) digits is 12002256, while the sum is 60.

The spelling of 771997902234 in words is "seven hundred seventy-one billion, nine hundred ninety-seven million, nine hundred two thousand, two hundred thirty-four".