125551554013 has 4 divisors (see below), whose sum is σ = 132159530560. Its totient is φ = 118943577468.

The previous prime is 125551553927. The next prime is 125551554043. The reversal of 125551554013 is 310455155521.

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-125551554013 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 (125551554043) 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, 3303988245 + ... + 3303988282.

It is an arithmetic number, because the mean of its divisors is an integer number (33039882640).

Almost surely, 2^125551554013 is an apocalyptic number.

It is an amenable number.

125551554013 is a deficient number, since it is larger than the sum of its proper divisors (6607976547).

125551554013 is an equidigital number, since it uses as much as digits as its factorization.

125551554013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607976546.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 125551554013 in words is "one hundred twenty-five billion, five hundred fifty-one million, five hundred fifty-four thousand, thirteen".