1022957865620 has 54 divisors (see below), whose sum is σ = 2245901314398. Its totient is φ = 391352770688.

The previous prime is 1022957865607. The next prime is 1022957865659. The reversal of 1022957865620 is 265687592201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 115309143184 + 907648722436 = 339572^2 + 952706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 104028224 + ... + 104038056.

Almost surely, 2^{1022957865620} is an apocalyptic number.

1022957865620 is a gapful number since it is divisible by the number (10) 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 1022957865620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122950657199).

1022957865620 is an abundant number, since it is smaller than the sum of its proper divisors (1222943448778).

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

1022957865620 is an frugal number, since it uses more digits than its factorization.

1022957865620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19721 (or 9863 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 1022957865620 in words is "one trillion, twenty-two billion, nine hundred fifty-seven million, eight hundred sixty-five thousand, six hundred twenty".