1642746674 has 4 divisors (see below), whose sum is σ = 2464120014. Its totient is φ = 821373336.

The previous prime is 1642746659. The next prime is 1642746709. The reversal of 1642746674 is 4766472461.

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

It can be written as a sum of positive squares in only one way, i.e., 1149684649 + 493062025 = 33907^2 + 22205^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410686667 + ... + 410686670.

Almost surely, 2^1642746674 is an apocalyptic number.

1642746674 is a deficient number, since it is larger than the sum of its proper divisors (821373340).

1642746674 is an equidigital number, since it uses as much as digits as its factorization.

1642746674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821373339.

The product of its digits is 1354752, while the sum is 47.

The square root of 1642746674 is about 40530.8114155145. The cubic root of 1642746674 is about 1179.9316904821.

The spelling of 1642746674 in words is "one billion, six hundred forty-two million, seven hundred forty-six thousand, six hundred seventy-four".