745164621 has 24 divisors (see below), whose sum is σ = 1153414080. Its totient is φ = 461913216.

The previous prime is 745164617. The next prime is 745164643. The reversal of 745164621 is 126461547.

745164621 is a `hidden beast` number, since 7 + 4 + 5 + 1 + 646 + 2 + 1 = 666.

It is not a de Polignac number, because 745164621 - 2² = 745164617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745164661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16641 + ... + 42038.

It is an arithmetic number, because the mean of its divisors is an integer number (48058920).

Almost surely, 2^745164621 is an apocalyptic number.

It is an amenable number.

745164621 is a deficient number, since it is larger than the sum of its proper divisors (408249459).

745164621 is a wasteful number, since it uses less digits than its factorization.

745164621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58785 (or 58782 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 745164621 is about 27297.7035847340. The cubic root of 745164621 is about 906.6035370158.

The spelling of 745164621 in words is "seven hundred forty-five million, one hundred sixty-four thousand, six hundred twenty-one".