51974559401 has 4 divisors (see below), whose sum is σ = 51976120704. Its totient is φ = 51972998100.

The previous prime is 51974559397. The next prime is 51974559409. The reversal of 51974559401 is 10495547915.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51974559401 - 2² = 51974559397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51974559401.

It is not an unprimeable number, because it can be changed into a prime (51974559409) 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, 729605 + ... + 797666.

It is an arithmetic number, because the mean of its divisors is an integer number (12994030176).

Almost surely, 2^51974559401 is an apocalyptic number.

It is an amenable number.

51974559401 is a deficient number, since it is larger than the sum of its proper divisors (1561303).

51974559401 is a wasteful number, since it uses less digits than its factorization.

51974559401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561302.

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 51974559401 in words is "fifty-one billion, nine hundred seventy-four million, five hundred fifty-nine thousand, four hundred one".