63697151520 has 192 divisors, whose sum is σ = 223443360000. Its totient is φ = 16947560448.

The previous prime is 63697151447. The next prime is 63697151527. The reversal of 63697151520 is 2515179636.

63697151520 is a `hidden beast` number, since 6 + 3 + 6 + 9 + 71 + 51 + 520 = 666.

It is a super-2 number, since 2×63697151520² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (63697151527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1923261 + ... + 1956099.

It is an arithmetic number, because the mean of its divisors is an integer number (1163767500).

Almost surely, 2^63697151520 is an apocalyptic number.

63697151520 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 63697151520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111721680000).

63697151520 is an abundant number, since it is smaller than the sum of its proper divisors (159746208480).

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

63697151520 is a wasteful number, since it uses less digits than its factorization.

63697151520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33312 (or 33298 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 63697151520 in words is "sixty-three billion, six hundred ninety-seven million, one hundred fifty-one thousand, five hundred twenty".