402457949187 has 32 divisors (see below), whose sum is σ = 649538486784. Its totient is φ = 216383116800.

The previous prime is 402457949147. The next prime is 402457949189. The reversal of 402457949187 is 781949754204.

It is not a de Polignac number, because 402457949187 - 2⁷ = 402457949059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402457949187.

It is not an unprimeable number, because it can be changed into a prime (402457949189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1036237 + ... + 1370657.

It is an arithmetic number, because the mean of its divisors is an integer number (20298077712).

Almost surely, 2^402457949187 is an apocalyptic number.

402457949187 is a deficient number, since it is larger than the sum of its proper divisors (247080537597).

402457949187 is a wasteful number, since it uses less digits than its factorization.

402457949187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337819.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 402457949187 in words is "four hundred two billion, four hundred fifty-seven million, nine hundred forty-nine thousand, one hundred eighty-seven".