123537071656 has 32 divisors (see below), whose sum is σ = 249278051880. Its totient is φ = 57182054400.

The previous prime is 123537071591. The next prime is 123537071677. The reversal of 123537071656 is 656170735321.

It can be written as a sum of positive squares in 4 ways, for example, as 102229830756 + 21307240900 = 319734^2 + 145970^2 .

It is a super-2 number, since 2×123537071656² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7437285 + ... + 7453876.

Almost surely, 2^123537071656 is an apocalyptic number.

It is an amenable number.

123537071656 is an abundant number, since it is smaller than the sum of its proper divisors (125740980224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123537071656 is a wasteful number, since it uses less digits than its factorization.

123537071656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14891245 (or 14891241 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 123537071656 in words is "one hundred twenty-three billion, five hundred thirty-seven million, seventy-one thousand, six hundred fifty-six".