56401623151 has 4 divisors (see below), whose sum is σ = 56402173312. Its totient is φ = 56401072992.

The previous prime is 56401623149. The next prime is 56401623221. The reversal of 56401623151 is 15132610465.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 56401623151 - 2¹ = 56401623149 is a prime.

It is a super-2 number, since 2×56401623151² (a number of 22 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 (56401623121) 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 3 ways as a sum of consecutive naturals, for example, 70671 + ... + 343216.

It is an arithmetic number, because the mean of its divisors is an integer number (14100543328).

Almost surely, 2^56401623151 is an apocalyptic number.

56401623151 is a deficient number, since it is larger than the sum of its proper divisors (550161).

56401623151 is a wasteful number, since it uses less digits than its factorization.

56401623151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550160.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 56401623151 in words is "fifty-six billion, four hundred one million, six hundred twenty-three thousand, one hundred fifty-one".