771997902328 has 16 divisors (see below), whose sum is σ = 1447522043760. Its totient is φ = 385992024000.

The previous prime is 771997902323. The next prime is 771997902329. The reversal of 771997902328 is 823209799177.

It is a super-2 number, since 2×771997902328² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 771997902328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771997902323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375948 + ... + 1298203.

It is an arithmetic number, because the mean of its divisors is an integer number (90470127735).

Almost surely, 2^771997902328 is an apocalyptic number.

It is an amenable number.

771997902328 is a deficient number, since it is larger than the sum of its proper divisors (675524141432).

771997902328 is a wasteful number, since it uses less digits than its factorization.

771997902328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731798 (or 1731794 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 64.

The spelling of 771997902328 in words is "seven hundred seventy-one billion, nine hundred ninety-seven million, nine hundred two thousand, three hundred twenty-eight".