1977902706925 has 6 divisors (see below), whose sum is σ = 2452599356618. Its totient is φ = 1582322165520.

The previous prime is 1977902706907. The next prime is 1977902706931. The reversal of 1977902706925 is 5296072097791.

It can be written as a sum of positive squares in 3 ways, for example, as 636264666244 + 1341638040681 = 797662^2 + 1158291^2 .

It is not a de Polignac number, because 1977902706925 - 2¹⁵ = 1977902674157 is a prime.

It is a super-2 number, since 2×1977902706925² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39558054114 + ... + 39558054163.

Almost surely, 2^{1977902706925} is an apocalyptic number.

It is an amenable number.

1977902706925 is a deficient number, since it is larger than the sum of its proper divisors (474696649693).

1977902706925 is an equidigital number, since it uses as much as digits as its factorization.

1977902706925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79116108287 (or 79116108282 counting only the distinct ones).

The product of its (nonzero) digits is 30005640, while the sum is 64.

The spelling of 1977902706925 in words is "one trillion, nine hundred seventy-seven billion, nine hundred two million, seven hundred six thousand, nine hundred twenty-five".