2511565478423 has 4 divisors (see below), whose sum is σ = 2511585064488. Its totient is φ = 2511545892360.

The previous prime is 2511565478417. The next prime is 2511565478441. The reversal of 2511565478423 is 3248745651152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2511565478423 - 2³² = 2507270511127 is a prime.

It is a super-2 number, since 2×2511565478423² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2511565478453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9599408 + ... + 9857573.

It is an arithmetic number, because the mean of its divisors is an integer number (627896266122).

Almost surely, 2^{2511565478423} is an apocalyptic number.

2511565478423 is a deficient number, since it is larger than the sum of its proper divisors (19586065).

2511565478423 is a wasteful number, since it uses less digits than its factorization.

2511565478423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19586064.

The product of its digits is 8064000, while the sum is 53.

The spelling of 2511565478423 in words is "two trillion, five hundred eleven billion, five hundred sixty-five million, four hundred seventy-eight thousand, four hundred twenty-three".