63725615811 has 32 divisors (see below), whose sum is σ = 110913277440. Its totient is φ = 35650692000.

The previous prime is 63725615803. The next prime is 63725615813. The reversal of 63725615811 is 11851652736.

63725615811 is a `hidden beast` number, since 6 + 3 + 7 + 2 + 5 + 61 + 581 + 1 = 666.

It is not a de Polignac number, because 63725615811 - 2³ = 63725615803 is a prime.

It is a super-2 number, since 2×63725615811² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63725615813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8248615 + ... + 8256336.

It is an arithmetic number, because the mean of its divisors is an integer number (3466039920).

Almost surely, 2^63725615811 is an apocalyptic number.

63725615811 is a deficient number, since it is larger than the sum of its proper divisors (47187661629).

63725615811 is a wasteful number, since it uses less digits than its factorization.

63725615811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16504984 (or 16504978 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 63725615811 in words is "sixty-three billion, seven hundred twenty-five million, six hundred fifteen thousand, eight hundred eleven".