921634044144 has 80 divisors (see below), whose sum is σ = 2620317717504. Its totient is φ = 276811494400.

The previous prime is 921634044137. The next prime is 921634044157. The reversal of 921634044144 is 441440436129.

It is a super-2 number, since 2×921634044144² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 921634044096 and 921634044105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7663872 + ... + 7783199.

Almost surely, 2^921634044144 is an apocalyptic number.

It is an amenable number.

921634044144 is an abundant number, since it is smaller than the sum of its proper divisors (1698683673360).

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

921634044144 is a wasteful number, since it uses less digits than its factorization.

921634044144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15447206 (or 15447200 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 921634044144 in words is "nine hundred twenty-one billion, six hundred thirty-four million, forty-four thousand, one hundred forty-four".