642353545 has 8 divisors (see below), whose sum is σ = 804338496. Its totient is φ = 491540016.

The previous prime is 642353521. The next prime is 642353549. The reversal of 642353545 is 545353246.

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

It is a cyclic number.

It is not a de Polignac number, because 642353545 - 2⁷ = 642353417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642353549) 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, 2792727 + ... + 2792956.

It is an arithmetic number, because the mean of its divisors is an integer number (100542312).

Almost surely, 2^642353545 is an apocalyptic number.

It is an amenable number.

642353545 is a deficient number, since it is larger than the sum of its proper divisors (161984951).

642353545 is a wasteful number, since it uses less digits than its factorization.

642353545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585711.

The product of its digits is 216000, while the sum is 37.

The square root of 642353545 is about 25344.6946124825. The cubic root of 642353545 is about 862.8289502096.

The spelling of 642353545 in words is "six hundred forty-two million, three hundred fifty-three thousand, five hundred forty-five".