509127915023 has 16 divisors (see below), whose sum is σ = 626699766336. Its totient is φ = 402774543360.

The previous prime is 509127915013. The next prime is 509127915041. The reversal of 509127915023 is 320519721905.

It is a happy number.

It is a Cunningham number, because it is equal to 713532²-1.

It is not a de Polignac number, because 509127915023 - 2²⁸ = 508859479567 is a prime.

It is a super-2 number, since 2×509127915023² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509127915013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356765 + ... + 1070297.

It is an arithmetic number, because the mean of its divisors is an integer number (39168735396).

Almost surely, 2^509127915023 is an apocalyptic number.

509127915023 is a deficient number, since it is larger than the sum of its proper divisors (117571851313).

509127915023 is a wasteful number, since it uses less digits than its factorization.

509127915023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721394.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 509127915023 in words is "five hundred nine billion, one hundred twenty-seven million, nine hundred fifteen thousand, twenty-three".