2126379699925 has 54 divisors (see below), whose sum is σ = 2902922573894. Its totient is φ = 1535947065600.

The previous prime is 2126379699919. The next prime is 2126379699967. The reversal of 2126379699925 is 5299969736212.

It can be written as a sum of positive squares in 9 ways, for example, as 455580451089 + 1670799248836 = 674967^2 + 1292594^2 .

It is not a de Polignac number, because 2126379699925 - 2⁷ = 2126379699797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1235548065 + ... + 1235549785.

Almost surely, 2^{2126379699925} is an apocalyptic number.

2126379699925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2126379699925 is a deficient number, since it is larger than the sum of its proper divisors (776542873969).

2126379699925 is an frugal number, since it uses more digits than its factorization.

2126379699925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559 (or 1786 counting only the distinct ones).

The product of its digits is 198404640, while the sum is 70.

The spelling of 2126379699925 in words is "two trillion, one hundred twenty-six billion, three hundred seventy-nine million, six hundred ninety-nine thousand, nine hundred twenty-five".