402150666520 has 256 divisors, whose sum is σ = 1002641794560. Its totient is φ = 144558784512.

The previous prime is 402150666517. The next prime is 402150666523. The reversal of 402150666520 is 25666051204.

It is an interprime number because it is at equal distance from previous prime (402150666517) and next prime (402150666523).

It is a self number, because there is not a number n which added to its sum of digits gives 402150666520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402150666523) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 226307872 + ... + 226309648.

It is an arithmetic number, because the mean of its divisors is an integer number (3916569510).

Almost surely, 2^402150666520 is an apocalyptic number.

402150666520 is a gapful number since it is divisible by the number (40) 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 402150666520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501320897280).

402150666520 is an abundant number, since it is smaller than the sum of its proper divisors (600491128040).

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

402150666520 is a wasteful number, since it uses less digits than its factorization.

402150666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 402150666520 in words is "four hundred two billion, one hundred fifty million, six hundred sixty-six thousand, five hundred twenty".