421524087864 has 128 divisors (see below), whose sum is σ = 1168730933760. Its totient is φ = 125619200000.

The previous prime is 421524087857. The next prime is 421524087883. The reversal of 421524087864 is 468780425124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7488304 + ... + 7544384.

It is an arithmetic number, because the mean of its divisors is an integer number (9130710420).

Almost surely, 2^421524087864 is an apocalyptic number.

421524087864 is a gapful number since it is divisible by the number (44) 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 421524087864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584365466880).

421524087864 is an abundant number, since it is smaller than the sum of its proper divisors (747206845896).

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

421524087864 is a wasteful number, since it uses less digits than its factorization.

421524087864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56573 (or 56569 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 51.

The spelling of 421524087864 in words is "four hundred twenty-one billion, five hundred twenty-four million, eighty-seven thousand, eight hundred sixty-four".