101787797764 has 9 divisors (see below), whose sum is σ = 178129762741. Its totient is φ = 50893579840.

The previous prime is 101787797753. The next prime is 101787797767. The reversal of 101787797764 is 467797787101.

The square root of 101787797764 is 319042.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8200751364 + 93587046400 = 90558^2 + 305920^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101787797696 and 101787797705.

It is not an unprimeable number, because it can be changed into a prime (101787797767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 558324 + ... + 717844.

Almost surely, 2^101787797764 is an apocalyptic number.

101787797764 is the 319042-nd square number.

It is an amenable number.

101787797764 is a deficient number, since it is larger than the sum of its proper divisors (76341964977).

101787797764 is an frugal number, since it uses more digits than its factorization.

101787797764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319046 (or 159523 counting only the distinct ones).

The product of its (nonzero) digits is 29042496, while the sum is 64.

Multiplying 101787797764 by its sum of digits (64), we get a square (6514419056896 = 2552336²).

The spelling of 101787797764 in words is "one hundred one billion, seven hundred eighty-seven million, seven hundred ninety-seven thousand, seven hundred sixty-four".