1640234674 has 16 divisors (see below), whose sum is σ = 2650471488. Its totient is φ = 756785232.

The previous prime is 1640234669. The next prime is 1640234677. The reversal of 1640234674 is 4764320461.

It is not an unprimeable number, because it can be changed into a prime (1640234677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89569 + ... + 106315.

It is an arithmetic number, because the mean of its divisors is an integer number (165654468).

Almost surely, 2^1640234674 is an apocalyptic number.

1640234674 is a deficient number, since it is larger than the sum of its proper divisors (1010236814).

1640234674 is a wasteful number, since it uses less digits than its factorization.

1640234674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20529.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 1640234674 is about 40499.8107896815. The cubic root of 1640234674 is about 1179.3299542703.

It can be divided in two parts, 16402 and 34674, that added together give a square (51076 = 226²).

The spelling of 1640234674 in words is "one billion, six hundred forty million, two hundred thirty-four thousand, six hundred seventy-four".