56395451991 has 8 divisors (see below), whose sum is σ = 76099887360. Its totient is φ = 37143992312.

The previous prime is 56395451941. The next prime is 56395452037. The reversal of 56395451991 is 19915459365.

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

It is a cyclic number.

It is not a de Polignac number, because 56395451991 - 2⁶ = 56395451927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56395451941) 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, 113243631 + ... + 113244128.

It is an arithmetic number, because the mean of its divisors is an integer number (9512485920).

Almost surely, 2^56395451991 is an apocalyptic number.

56395451991 is a deficient number, since it is larger than the sum of its proper divisors (19704435369).

56395451991 is a wasteful number, since it uses less digits than its factorization.

56395451991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226487845.

The product of its digits is 6561000, while the sum is 57.

The spelling of 56395451991 in words is "fifty-six billion, three hundred ninety-five million, four hundred fifty-one thousand, nine hundred ninety-one".