620464645 has 16 divisors (see below), whose sum is σ = 753027840. Its totient is φ = 490744384.

The previous prime is 620464613. The next prime is 620464651. The reversal of 620464645 is 546464026.

It is a cyclic number.

It is not a de Polignac number, because 620464645 - 2⁵ = 620464613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383859 + ... + 385471.

It is an arithmetic number, because the mean of its divisors is an integer number (47064240).

Almost surely, 2^620464645 is an apocalyptic number.

It is an amenable number.

620464645 is a deficient number, since it is larger than the sum of its proper divisors (132563195).

620464645 is a wasteful number, since it uses less digits than its factorization.

620464645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444.

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 620464645 is about 24909.1277446642. The cubic root of 620464645 is about 852.9148578655.

The spelling of 620464645 in words is "six hundred twenty million, four hundred sixty-four thousand, six hundred forty-five".