402406763956 has 24 divisors (see below), whose sum is σ = 729261152424. Its totient is φ = 194170903680.

The previous prime is 402406763929. The next prime is 402406763963. The reversal of 402406763956 is 659367604204.

It can be written as a sum of positive squares in 4 ways, for example, as 59081080356 + 343325683600 = 243066^2 + 585940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15545635 + ... + 15571498.

It is an arithmetic number, because the mean of its divisors is an integer number (30385881351).

Almost surely, 2^402406763956 is an apocalyptic number.

It is an amenable number.

402406763956 is a deficient number, since it is larger than the sum of its proper divisors (326854388468).

402406763956 is a wasteful number, since it uses less digits than its factorization.

402406763956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31117251 (or 31117249 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 402406763956 in words is "four hundred two billion, four hundred six million, seven hundred sixty-three thousand, nine hundred fifty-six".