102764772820 has 12 divisors (see below), whose sum is σ = 215806022964. Its totient is φ = 41105909120.

The previous prime is 102764772797. The next prime is 102764772833. The reversal of 102764772820 is 28277467201.

It can be written as a sum of positive squares in 2 ways, for example, as 24587494416 + 78177278404 = 156804^2 + 279602^2 .

It is a congruent number.

It is an unprimeable number.

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, 2569119301 + ... + 2569119340.

It is an arithmetic number, because the mean of its divisors is an integer number (17983835247).

Almost surely, 2^102764772820 is an apocalyptic number.

102764772820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102764772820 is an abundant number, since it is smaller than the sum of its proper divisors (113041250144).

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

102764772820 is a wasteful number, since it uses less digits than its factorization.

102764772820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138238650 (or 5138238648 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 102764772820 in words is "one hundred two billion, seven hundred sixty-four million, seven hundred seventy-two thousand, eight hundred twenty".