1613642644 has 12 divisors (see below), whose sum is σ = 2824372768. Its totient is φ = 806679000.

The previous prime is 1613642633. The next prime is 1613642683. The reversal of 1613642644 is 4462463161.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7632 + ... + 57319.

Almost surely, 2^1613642644 is an apocalyptic number.

It is an amenable number.

1613642644 is a deficient number, since it is larger than the sum of its proper divisors (1210730124).

1613642644 is a wasteful number, since it uses less digits than its factorization.

1613642644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71166 (or 71164 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 1613642644 is about 40170.1710725757. The cubic root of 1613642644 is about 1172.9219692232.

The spelling of 1613642644 in words is "one billion, six hundred thirteen million, six hundred forty-two thousand, six hundred forty-four".