63861157040 has 20 divisors (see below), whose sum is σ = 148477190304. Its totient is φ = 25544462784.

The previous prime is 63861157037. The next prime is 63861157057. The reversal of 63861157040 is 4075116836.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399132152 + ... + 399132311.

Almost surely, 2^63861157040 is an apocalyptic number.

It is an amenable number.

63861157040 is an abundant number, since it is smaller than the sum of its proper divisors (84616033264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63861157040 is a wasteful number, since it uses less digits than its factorization.

63861157040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798264476 (or 798264470 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 63861157040 in words is "sixty-three billion, eight hundred sixty-one million, one hundred fifty-seven thousand, forty".