1618647674 has 24 divisors (see below), whose sum is σ = 2832011028. Its totient is φ = 691830720.

The previous prime is 1618647661. The next prime is 1618647689. The reversal of 1618647674 is 4767468161.

It can be written as a sum of positive squares in 2 ways, for example, as 1591451449 + 27196225 = 39893^2 + 5215^2 .

It is a super-2 number, since 2×1618647674² = 5240040585091220552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14414 + ... + 58694.

Almost surely, 2^1618647674 is an apocalyptic number.

1618647674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1618647674 is a deficient number, since it is larger than the sum of its proper divisors (1213363354).

1618647674 is a wasteful number, since it uses less digits than its factorization.

1618647674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44670 (or 44663 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 1618647674 is about 40232.4206828274. The cubic root of 1618647674 is about 1174.1334003062.

The spelling of 1618647674 in words is "one billion, six hundred eighteen million, six hundred forty-seven thousand, six hundred seventy-four".