1938777560920 has 32 divisors (see below), whose sum is σ = 4379223268800. Its totient is φ = 772493467648.

The previous prime is 1938777560917. The next prime is 1938777560957. The reversal of 1938777560920 is 290657778391.

It is a super-2 number, since 2×1938777560920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94288240 + ... + 94308799.

It is an arithmetic number, because the mean of its divisors is an integer number (136850727150).

Almost surely, 2^{1938777560920} is an apocalyptic number.

1938777560920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938777560920 is an abundant number, since it is smaller than the sum of its proper divisors (2440445707880).

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

1938777560920 is a wasteful number, since it uses less digits than its factorization.

1938777560920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188597307 (or 188597303 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 64.

The spelling of 1938777560920 in words is "one trillion, nine hundred thirty-eight billion, seven hundred seventy-seven million, five hundred sixty thousand, nine hundred twenty".