125145684791 has 4 divisors (see below), whose sum is σ = 131732299800. Its totient is φ = 118559069784.

The previous prime is 125145684761. The next prime is 125145684793. The reversal of 125145684791 is 197486541521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197486541521 = 313 ⋅630947417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125145684791 is a prime.

It is a super-2 number, since 2×125145684791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125145684793) 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, 3293307476 + ... + 3293307513.

It is an arithmetic number, because the mean of its divisors is an integer number (32933074950).

Almost surely, 2^125145684791 is an apocalyptic number.

125145684791 is a deficient number, since it is larger than the sum of its proper divisors (6586615009).

125145684791 is an equidigital number, since it uses as much as digits as its factorization.

125145684791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586615008.

The product of its digits is 2419200, while the sum is 53.

The spelling of 125145684791 in words is "one hundred twenty-five billion, one hundred forty-five million, six hundred eighty-four thousand, seven hundred ninety-one".