125425521553 has 4 divisors (see below), whose sum is σ = 125426944000. Its totient is φ = 125424099108.

The previous prime is 125425521497. The next prime is 125425521589. The reversal of 125425521553 is 355125524521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125425521553 is a prime.

It is a super-2 number, since 2×125425521553² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125425591553) 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, 569553 + ... + 758446.

It is an arithmetic number, because the mean of its divisors is an integer number (31356736000).

Almost surely, 2^125425521553 is an apocalyptic number.

It is an amenable number.

125425521553 is a deficient number, since it is larger than the sum of its proper divisors (1422447).

125425521553 is an equidigital number, since it uses as much as digits as its factorization.

125425521553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422446.

The product of its digits is 300000, while the sum is 40.

The spelling of 125425521553 in words is "one hundred twenty-five billion, four hundred twenty-five million, five hundred twenty-one thousand, five hundred fifty-three".