642995410 has 16 divisors (see below), whose sum is σ = 1158748416. Its totient is φ = 256896688.

The previous prime is 642995399. The next prime is 642995411. The reversal of 642995410 is 14599246.

It is not an unprimeable number, because it can be changed into a prime (642995411) 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, 28624 + ... + 45883.

It is an arithmetic number, because the mean of its divisors is an integer number (72421776).

Almost surely, 2^642995410 is an apocalyptic number.

642995410 is a deficient number, since it is larger than the sum of its proper divisors (515753006).

642995410 is a wasteful number, since it uses less digits than its factorization.

642995410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75377.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 642995410 is about 25357.3541600854. The cubic root of 642995410 is about 863.1162454458.

The spelling of 642995410 in words is "six hundred forty-two million, nine hundred ninety-five thousand, four hundred ten".