125277762639 has 4 divisors (see below), whose sum is σ = 167037016856. Its totient is φ = 83518508424.

The previous prime is 125277762637. The next prime is 125277762661. The reversal of 125277762639 is 936267772521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936267772521 = 3 ⋅312089257507.

It is not a de Polignac number, because 125277762639 - 2¹ = 125277762637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125277762637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20879627104 + ... + 20879627109.

It is an arithmetic number, because the mean of its divisors is an integer number (41759254214).

Almost surely, 2^125277762639 is an apocalyptic number.

125277762639 is a deficient number, since it is larger than the sum of its proper divisors (41759254217).

125277762639 is an equidigital number, since it uses as much as digits as its factorization.

125277762639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41759254216.

The product of its digits is 13335840, while the sum is 57.

The spelling of 125277762639 in words is "one hundred twenty-five billion, two hundred seventy-seven million, seven hundred sixty-two thousand, six hundred thirty-nine".