63243557065057 has 4 divisors (see below), whose sum is σ = 66963766304196. Its totient is φ = 59523347825920.

The previous prime is 63243557065049. The next prime is 63243557065069. The reversal of 63243557065057 is 75056075534236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20481426460881 + 42762130604176 = 4525641^2 + 6539276^2 .

It is a cyclic number.

It is not a de Polignac number, because 63243557065057 - 2³ = 63243557065049 is a prime.

It is a super-2 number, since 2×63243557065057² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63243557064992 and 63243557065010.

It is not an unprimeable number, because it can be changed into a prime (63243557065097) 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, 1860104619544 + ... + 1860104619577.

It is an arithmetic number, because the mean of its divisors is an integer number (16740941576049).

Almost surely, 2^{63243557065057} is an apocalyptic number.

It is an amenable number.

63243557065057 is a deficient number, since it is larger than the sum of its proper divisors (3720209239139).

63243557065057 is a wasteful number, since it uses less digits than its factorization.

63243557065057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720209239138.

The product of its (nonzero) digits is 79380000, while the sum is 58.

The spelling of 63243557065057 in words is "sixty-three trillion, two hundred forty-three billion, five hundred fifty-seven million, sixty-five thousand, fifty-seven".