63942389652 has 48 divisors (see below), whose sum is σ = 155759788800. Its totient is φ = 20390348160.

The previous prime is 63942389633. The next prime is 63942389653. The reversal of 63942389652 is 25698324936.

It is a happy number.

It is a super-2 number, since 2×63942389652² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 63942389592 and 63942389601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63942389653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804924 + ... + 880787.

It is an arithmetic number, because the mean of its divisors is an integer number (3244995600).

Almost surely, 2^63942389652 is an apocalyptic number.

It is an amenable number.

63942389652 is an abundant number, since it is smaller than the sum of its proper divisors (91817399148).

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

63942389652 is a wasteful number, since it uses less digits than its factorization.

63942389652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685856 (or 1685854 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 57.

The spelling of 63942389652 in words is "sixty-three billion, nine hundred forty-two million, three hundred eighty-nine thousand, six hundred fifty-two".