63490790520 has 160 divisors (see below), whose sum is σ = 213502806000. Its totient is φ = 16922691072.

The previous prime is 63490790509. The next prime is 63490790537. The reversal of 63490790520 is 2509709436.

It is a happy number.

63490790520 is a `hidden beast` number, since 6 + 34 + 9 + 0 + 7 + 90 + 520 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9875547 + ... + 9881973.

Almost surely, 2^63490790520 is an apocalyptic number.

63490790520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63490790520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106751403000).

63490790520 is an abundant number, since it is smaller than the sum of its proper divisors (150012015480).

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

63490790520 is a wasteful number, since it uses less digits than its factorization.

63490790520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9499 (or 9486 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 63490790520 in words is "sixty-three billion, four hundred ninety million, seven hundred ninety thousand, five hundred twenty".