51549970363 has 4 divisors (see below), whose sum is σ = 51555452760. Its totient is φ = 51544487968.

The previous prime is 51549970343. The next prime is 51549970369. The reversal of 51549970363 is 36307994515.

51549970363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51549970363 - 2⁵ = 51549970331 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 51549970363.

It is not an unprimeable number, because it can be changed into a prime (51549970369) 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, 2727070 + ... + 2745907.

It is an arithmetic number, because the mean of its divisors is an integer number (12888863190).

Almost surely, 2^51549970363 is an apocalyptic number.

51549970363 is a deficient number, since it is larger than the sum of its proper divisors (5482397).

51549970363 is an equidigital number, since it uses as much as digits as its factorization.

51549970363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482396.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 51549970363 in words is "fifty-one billion, five hundred forty-nine million, nine hundred seventy thousand, three hundred sixty-three".