11925172511 has 8 divisors (see below), whose sum is σ = 13704067104. Its totient is φ = 10165102560.

The previous prime is 11925172489. The next prime is 11925172537. The reversal of 11925172511 is 11527152911.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11925172511 is a prime.

It is a super-2 number, since 2×11925172511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11925972511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4704800 + ... + 4707333.

It is an arithmetic number, because the mean of its divisors is an integer number (1713008388).

Almost surely, 2^11925172511 is an apocalyptic number.

11925172511 is a deficient number, since it is larger than the sum of its proper divisors (1778894593).

11925172511 is an equidigital number, since it uses as much as digits as its factorization.

11925172511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412321.

The product of its digits is 6300, while the sum is 35.

The spelling of 11925172511 in words is "eleven billion, nine hundred twenty-five million, one hundred seventy-two thousand, five hundred eleven".