1788157792980 has 144 divisors (see below), whose sum is σ = 5937075200784. Its totient is φ = 432946114560.

The previous prime is 1788157792907. The next prime is 1788157792991. The reversal of 1788157792980 is 892977518871.

It can be written as a sum of positive squares in 8 ways, for example, as 668188535184 + 1119969257796 = 817428^2 + 1058286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1788157792899 and 1788157792908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6120949 + ... + 6406428.

Almost surely, 2^{1788157792980} is an apocalyptic number.

1788157792980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1788157792980 is an abundant number, since it is smaller than the sum of its proper divisors (4148917407804).

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

1788157792980 is a wasteful number, since it uses less digits than its factorization.

1788157792980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12527466 (or 12527461 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 72.

The spelling of 1788157792980 in words is "one trillion, seven hundred eighty-eight billion, one hundred fifty-seven million, seven hundred ninety-two thousand, nine hundred eighty".