125655712978 has 4 divisors (see below), whose sum is σ = 188483569470. Its totient is φ = 62827856488.

The previous prime is 125655712961. The next prime is 125655712979. The reversal of 125655712978 is 879217556521.

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., 72284086449 + 53371626529 = 268857^2 + 231023^2 .

It is not an unprimeable number, because it can be changed into a prime (125655712979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31413928243 + ... + 31413928246.

Almost surely, 2^125655712978 is an apocalyptic number.

125655712978 is a deficient number, since it is larger than the sum of its proper divisors (62827856492).

125655712978 is an equidigital number, since it uses as much as digits as its factorization.

125655712978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62827856491.

The product of its digits is 10584000, while the sum is 58.

The spelling of 125655712978 in words is "one hundred twenty-five billion, six hundred fifty-five million, seven hundred twelve thousand, nine hundred seventy-eight".