125442531513 has 12 divisors (see below), whose sum is σ = 195132826980. Its totient is φ = 77195403936.

The previous prime is 125442531469. The next prime is 125442531541. The reversal of 125442531513 is 315135244521.

125442531513 is a `hidden beast` number, since 1 + 2 + 54 + 42 + 53 + 1 + 513 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15333373584 + 110109157929 = 123828^2 + 331827^2 .

It is not a de Polignac number, because 125442531513 - 2¹³ = 125442523321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125442531013) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 536079078 + ... + 536079311.

It is an arithmetic number, because the mean of its divisors is an integer number (16261068915).

Almost surely, 2^125442531513 is an apocalyptic number.

125442531513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

125442531513 is a deficient number, since it is larger than the sum of its proper divisors (69690295467).

125442531513 is a wasteful number, since it uses less digits than its factorization.

125442531513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072158408 (or 1072158405 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 125442531513 in words is "one hundred twenty-five billion, four hundred forty-two million, five hundred thirty-one thousand, five hundred thirteen".