645413134 has 4 divisors (see below), whose sum is σ = 968119704. Its totient is φ = 322706566.

The previous prime is 645413113. The next prime is 645413207. The reversal of 645413134 is 431314546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×645413134² = 833116227079403912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645413096 and 645413105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161353282 + ... + 161353285.

It is an arithmetic number, because the mean of its divisors is an integer number (242029926).

Almost surely, 2^645413134 is an apocalyptic number.

645413134 is a deficient number, since it is larger than the sum of its proper divisors (322706570).

645413134 is a wasteful number, since it uses less digits than its factorization.

645413134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322706569.

The product of its digits is 17280, while the sum is 31.

The square root of 645413134 is about 25404.9824640758. The cubic root of 645413134 is about 864.1966921518.

The spelling of 645413134 in words is "six hundred forty-five million, four hundred thirteen thousand, one hundred thirty-four".