63921369395 has 24 divisors (see below), whose sum is σ = 83135544336. Its totient is φ = 47160517248.

The previous prime is 63921369383. The next prime is 63921369541. The reversal of 63921369395 is 59396312936.

It is not a de Polignac number, because 63921369395 - 2¹⁸ = 63921107251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63921369395.

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, 910004 + ... + 977726.

It is an arithmetic number, because the mean of its divisors is an integer number (3463981014).

Almost surely, 2^63921369395 is an apocalyptic number.

63921369395 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63921369395 is a deficient number, since it is larger than the sum of its proper divisors (19214174941).

63921369395 is a wasteful number, since it uses less digits than its factorization.

63921369395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68871 (or 68858 counting only the distinct ones).

The product of its digits is 7085880, while the sum is 56.

The spelling of 63921369395 in words is "sixty-three billion, nine hundred twenty-one million, three hundred sixty-nine thousand, three hundred ninety-five".