63958793820 has 24 divisors (see below), whose sum is σ = 179084622864. Its totient is φ = 17055678336.

The previous prime is 63958793803. The next prime is 63958793831. The reversal of 63958793820 is 2839785936.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 1065979897 = 63958793820 / (6 + 3 + 9 + 5 + 8 + 7 + 9 + 3 + 8 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532989889 + ... + 532990008.

It is an arithmetic number, because the mean of its divisors is an integer number (7461859286).

Almost surely, 2^63958793820 is an apocalyptic number.

63958793820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63958793820 is an abundant number, since it is smaller than the sum of its proper divisors (115125829044).

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

63958793820 is a wasteful number, since it uses less digits than its factorization.

63958793820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065979909 (or 1065979907 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 63958793820 in words is "sixty-three billion, nine hundred fifty-eight million, seven hundred ninety-three thousand, eight hundred twenty".