642465442370 has 8 divisors (see below), whose sum is σ = 1156437796284. Its totient is φ = 256986176944.

The previous prime is 642465442361. The next prime is 642465442373. The reversal of 642465442370 is 73244564246.

It can be written as a sum of positive squares in 2 ways, for example, as 630386772961 + 12078669409 = 793969^2 + 109903^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (642465442373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32123272109 + ... + 32123272128.

Almost surely, 2^642465442370 is an apocalyptic number.

642465442370 is a deficient number, since it is larger than the sum of its proper divisors (513972353914).

642465442370 is a wasteful number, since it uses less digits than its factorization.

642465442370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64246544244.

The product of its (nonzero) digits is 3870720, while the sum is 47.

The spelling of 642465442370 in words is "six hundred forty-two billion, four hundred sixty-five million, four hundred forty-two thousand, three hundred seventy".