125531914405 has 4 divisors (see below), whose sum is σ = 150638297292. Its totient is φ = 100425531520.

The previous prime is 125531914393. The next prime is 125531914423. The reversal of 125531914405 is 504419135521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40817737156 + 84714177249 = 202034^2 + 291057^2 .

It is a de Polignac number, because none of the positive numbers 2^k-125531914405 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 3 ways as a sum of consecutive naturals, for example, 12553191436 + ... + 12553191445.

It is an arithmetic number, because the mean of its divisors is an integer number (37659574323).

Almost surely, 2^125531914405 is an apocalyptic number.

It is an amenable number.

125531914405 is a deficient number, since it is larger than the sum of its proper divisors (25106382887).

125531914405 is an equidigital number, since it uses as much as digits as its factorization.

125531914405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25106382886.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 125531914405 in words is "one hundred twenty-five billion, five hundred thirty-one million, nine hundred fourteen thousand, four hundred five".