125624667661999 has 16 divisors (see below), whose sum is σ = 140428266634656. Its totient is φ = 111386542694400.

The previous prime is 125624667661949. The next prime is 125624667662009. The reversal of 125624667661999 is 999166766426521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125624667661999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125624667661949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38728272 + ... + 41846485.

It is an arithmetic number, because the mean of its divisors is an integer number (8776766664666).

Almost surely, 2^{125624667661999} is an apocalyptic number.

125624667661999 is a deficient number, since it is larger than the sum of its proper divisors (14803598972657).

125624667661999 is a wasteful number, since it uses less digits than its factorization.

125624667661999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80578266.

The product of its digits is 3174474240, while the sum is 79.

The spelling of 125624667661999 in words is "one hundred twenty-five trillion, six hundred twenty-four billion, six hundred sixty-seven million, six hundred sixty-one thousand, nine hundred ninety-nine".