642165476 has 12 divisors (see below), whose sum is σ = 1123994172. Its totient is φ = 321024288.

The previous prime is 642165457. The next prime is 642165481. The reversal of 642165476 is 674561246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 185232100 + 456933376 = 13610^2 + 21376^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18386 + ... + 40278.

It is an arithmetic number, because the mean of its divisors is an integer number (93666181).

Almost surely, 2^642165476 is an apocalyptic number.

It is an amenable number.

642165476 is a deficient number, since it is larger than the sum of its proper divisors (481828696).

642165476 is a wasteful number, since it uses less digits than its factorization.

642165476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29230 (or 29228 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 642165476 is about 25340.9841166439. The cubic root of 642165476 is about 862.7447353104.

The spelling of 642165476 in words is "six hundred forty-two million, one hundred sixty-five thousand, four hundred seventy-six".