402542023512 has 32 divisors (see below), whose sum is σ = 1006552728000. Its totient is φ = 134154318624.

The previous prime is 402542023493. The next prime is 402542023517. The reversal of 402542023512 is 215320245204.

It is a self number, because there is not a number n which added to its sum of digits gives 402542023512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402542023517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522318 + ... + 1767069.

It is an arithmetic number, because the mean of its divisors is an integer number (31454772750).

Almost surely, 2^402542023512 is an apocalyptic number.

It is an amenable number.

402542023512 is an abundant number, since it is smaller than the sum of its proper divisors (604010704488).

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

402542023512 is a wasteful number, since it uses less digits than its factorization.

402542023512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294495 (or 3294491 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 402542023512 its reverse (215320245204), we get a palindrome (617862268716).

The spelling of 402542023512 in words is "four hundred two billion, five hundred forty-two million, twenty-three thousand, five hundred twelve".