863817532620 has 48 divisors (see below), whose sum is σ = 2764216105728. Its totient is φ = 197444007360.

The previous prime is 863817532553. The next prime is 863817532679. The reversal of 863817532620 is 26235718368.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028353786 + ... + 1028354625.

It is an arithmetic number, because the mean of its divisors is an integer number (57587835536).

Almost surely, 2^863817532620 is an apocalyptic number.

It is an amenable number.

863817532620 is an abundant number, since it is smaller than the sum of its proper divisors (1900398573108).

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

863817532620 is a wasteful number, since it uses less digits than its factorization.

863817532620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056708430 (or 2056708428 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 863817532620 in words is "eight hundred sixty-three billion, eight hundred seventeen million, five hundred thirty-two thousand, six hundred twenty".