1864632634 has 4 divisors (see below), whose sum is σ = 2796948954. Its totient is φ = 932316316.

The previous prime is 1864632631. The next prime is 1864632677. The reversal of 1864632634 is 4362364681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4362364681 = 32261 ⋅135221.

It can be written as a sum of positive squares in only one way, i.e., 1631917609 + 232715025 = 40397^2 + 15255^2 .

It is not an unprimeable number, because it can be changed into a prime (1864632631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 466158157 + ... + 466158160.

Almost surely, 2^1864632634 is an apocalyptic number.

1864632634 is a deficient number, since it is larger than the sum of its proper divisors (932316320).

1864632634 is an equidigital number, since it uses as much as digits as its factorization.

1864632634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932316319.

The product of its digits is 497664, while the sum is 43.

The square root of 1864632634 is about 43181.3922193345. The cubic root of 1864632634 is about 1230.8291133622.

The spelling of 1864632634 in words is "one billion, eight hundred sixty-four million, six hundred thirty-two thousand, six hundred thirty-four".