127617991512 has 32 divisors (see below), whose sum is σ = 348049068480. Its totient is φ = 38672118560.

The previous prime is 127617991489. The next prime is 127617991519. The reversal of 127617991512 is 215199716721.

It is a super-2 number, since 2×127617991512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127617991519) 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, 241700478 + ... + 241701005.

It is an arithmetic number, because the mean of its divisors is an integer number (10876533390).

Almost surely, 2^127617991512 is an apocalyptic number.

127617991512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

127617991512 is an abundant number, since it is smaller than the sum of its proper divisors (220431076968).

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

127617991512 is a wasteful number, since it uses less digits than its factorization.

127617991512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483401503 (or 483401499 counting only the distinct ones).

The product of its digits is 476280, while the sum is 51.

The spelling of 127617991512 in words is "one hundred twenty-seven billion, six hundred seventeen million, nine hundred ninety-one thousand, five hundred twelve".