363963799557 has 6 divisors (see below), whose sum is σ = 525725488262. Its totient is φ = 242642533032.

The previous prime is 363963799541. The next prime is 363963799561. The reversal of 363963799557 is 755997369363.

It is a happy number.

363963799557 is a `hidden beast` number, since 3 + 6 + 3 + 9 + 63 + 7 + 9 + 9 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200877861636 + 163085937921 = 448194^2 + 403839^2 .

It is not a de Polignac number, because 363963799557 - 2⁴ = 363963799541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363963799597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20220211078 + ... + 20220211095.

Almost surely, 2^363963799557 is an apocalyptic number.

It is an amenable number.

363963799557 is a deficient number, since it is larger than the sum of its proper divisors (161761688705).

363963799557 is a wasteful number, since it uses less digits than its factorization.

363963799557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40440422179 (or 40440422176 counting only the distinct ones).

The product of its digits is 868020300, while the sum is 72.

The spelling of 363963799557 in words is "three hundred sixty-three billion, nine hundred sixty-three million, seven hundred ninety-nine thousand, five hundred fifty-seven".