642653545 has 8 divisors (see below), whose sum is σ = 780946560. Its totient is φ = 507614640.

The previous prime is 642653537. The next prime is 642653551. The reversal of 642653545 is 545356246.

It is a happy number.

642653545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 642653545 - 2³ = 642653537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642653498 and 642653507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813091 + ... + 813880.

It is an arithmetic number, because the mean of its divisors is an integer number (97618320).

Almost surely, 2^642653545 is an apocalyptic number.

It is an amenable number.

642653545 is a deficient number, since it is larger than the sum of its proper divisors (138293015).

642653545 is a wasteful number, since it uses less digits than its factorization.

642653545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627055.

The product of its digits is 432000, while the sum is 40.

The square root of 642653545 is about 25350.6123200210. The cubic root of 642653545 is about 862.9632523659.

The spelling of 642653545 in words is "six hundred forty-two million, six hundred fifty-three thousand, five hundred forty-five".