125137071557 has 8 divisors (see below), whose sum is σ = 129458523000. Its totient is φ = 120816045504.

The previous prime is 125137071547. The next prime is 125137071593. The reversal of 125137071557 is 755170731521.

It can be written as a sum of positive squares in 4 ways, for example, as 1344982276 + 123792089281 = 36674^2 + 351841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125137071557 - 2⁴ = 125137071541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125137071547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563819 + ... + 753767.

It is an arithmetic number, because the mean of its divisors is an integer number (16182315375).

Almost surely, 2^125137071557 is an apocalyptic number.

It is an amenable number.

125137071557 is a deficient number, since it is larger than the sum of its proper divisors (4321451443).

125137071557 is a wasteful number, since it uses less digits than its factorization.

125137071557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212695.

The product of its (nonzero) digits is 257250, while the sum is 44.

The spelling of 125137071557 in words is "one hundred twenty-five billion, one hundred thirty-seven million, seventy-one thousand, five hundred fifty-seven".