63145645515 has 24 divisors (see below), whose sum is σ = 110682262080. Its totient is φ = 33299274624.

The previous prime is 63145645501. The next prime is 63145645543. The reversal of 63145645515 is 51554654136.

63145645515 is a `hidden beast` number, since 6 + 31 + 4 + 5 + 64 + 551 + 5 = 666.

It is not a de Polignac number, because 63145645515 - 2⁵ = 63145645483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7879347 + ... + 7887356.

It is an arithmetic number, because the mean of its divisors is an integer number (4611760920).

Almost surely, 2^63145645515 is an apocalyptic number.

63145645515 is a deficient number, since it is larger than the sum of its proper divisors (47536616565).

63145645515 is a wasteful number, since it uses less digits than its factorization.

63145645515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15766803 (or 15766800 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 63145645515 in words is "sixty-three billion, one hundred forty-five million, six hundred forty-five thousand, five hundred fifteen".