125655380081 has 16 divisors (see below), whose sum is σ = 157110172800. Its totient is φ = 97632708480.

The previous prime is 125655380069. The next prime is 125655380113. The reversal of 125655380081 is 180083556521.

It is a cyclic number.

It is not a de Polignac number, because 125655380081 - 2⁶ = 125655380017 is a prime.

It is a super-2 number, since 2×125655380081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125655380021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2311076 + ... + 2364821.

It is an arithmetic number, because the mean of its divisors is an integer number (9819385800).

Almost surely, 2^125655380081 is an apocalyptic number.

125655380081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125655380081 is a deficient number, since it is larger than the sum of its proper divisors (31454792719).

125655380081 is a wasteful number, since it uses less digits than its factorization.

125655380081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676264.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 125655380081 in words is "one hundred twenty-five billion, six hundred fifty-five million, three hundred eighty thousand, eighty-one".