402640645250460 has 96 divisors (see below), whose sum is σ = 1134650298442752. Its totient is φ = 106680819951360.

The previous prime is 402640645250453. The next prime is 402640645250477. The reversal of 402640645250460 is 64052546046204.

It is a happy number.

It is a super-3 number, since 3×402640645250460³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4828114 + ... + 28785273.

It is an arithmetic number, because the mean of its divisors is an integer number (11819273942112).

Almost surely, 2^{402640645250460} is an apocalyptic number.

It is an amenable number.

402640645250460 is an abundant number, since it is smaller than the sum of its proper divisors (732009653192292).

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

402640645250460 is a wasteful number, since it uses less digits than its factorization.

402640645250460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33614683 (or 33614681 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 402640645250460 in words is "four hundred two trillion, six hundred forty billion, six hundred forty-five million, two hundred fifty thousand, four hundred sixty".