125540573402 has 4 divisors (see below), whose sum is σ = 188310860106. Its totient is φ = 62770286700.

The previous prime is 125540573393. The next prime is 125540573413. The reversal of 125540573402 is 204375045521.

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

It can be written as a sum of positive squares in only one way, i.e., 100039996681 + 25500576721 = 316291^2 + 159689^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31385143349 + ... + 31385143352.

Almost surely, 2^125540573402 is an apocalyptic number.

125540573402 is a deficient number, since it is larger than the sum of its proper divisors (62770286704).

125540573402 is an equidigital number, since it uses as much as digits as its factorization.

125540573402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62770286703.

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 125540573402 in words is "one hundred twenty-five billion, five hundred forty million, five hundred seventy-three thousand, four hundred two".