921455452764 has 288 divisors, whose sum is σ = 3108689805312. Its totient is φ = 231617880000.

The previous prime is 921455452747. The next prime is 921455452787. The reversal of 921455452764 is 467254554129.

921455452764 is a `hidden beast` number, since 9 + 2 + 1 + 4 + 5 + 54 + 527 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 921455452764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2121589 + ... + 2518739.

It is an arithmetic number, because the mean of its divisors is an integer number (10794061824).

Almost surely, 2^921455452764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921455452764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554344902656).

921455452764 is an abundant number, since it is smaller than the sum of its proper divisors (2187234352548).

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

921455452764 is a wasteful number, since it uses less digits than its factorization.

921455452764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397219 (or 397205 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 921455452764 in words is "nine hundred twenty-one billion, four hundred fifty-five million, four hundred fifty-two thousand, seven hundred sixty-four".