125220423445515 has 32 divisors (see below), whose sum is σ = 222623053646400. Its totient is φ = 66781535581440.

The previous prime is 125220423445459. The next prime is 125220423445519. The reversal of 125220423445515 is 515544324022521.

125220423445515 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 20 + 42 + 34 + 4 + 551 + 5 = 666.

It is not a de Polignac number, because 125220423445515 - 2¹⁸ = 125220423183371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (125220423445519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15316380 + ... + 22023449.

It is an arithmetic number, because the mean of its divisors is an integer number (6956970426450).

Almost surely, 2^{125220423445515} is an apocalyptic number.

125220423445515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125220423445515 is a deficient number, since it is larger than the sum of its proper divisors (97402630200885).

125220423445515 is a wasteful number, since it uses less digits than its factorization.

125220423445515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37364684 (or 37364678 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

The spelling of 125220423445515 in words is "one hundred twenty-five trillion, two hundred twenty billion, four hundred twenty-three million, four hundred forty-five thousand, five hundred fifteen".