3642945994 has 8 divisors (see below), whose sum is σ = 5471013060. Its totient is φ = 1819274976.

The previous prime is 3642945991. The next prime is 3642946001. The reversal of 3642945994 is 4995492463.

It is a happy number.

3642945994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3476871225 + 166074769 = 58965^2 + 12887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3642945991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1096939 + ... + 1100254.

Almost surely, 2^3642945994 is an apocalyptic number.

3642945994 is a deficient number, since it is larger than the sum of its proper divisors (1828067066).

3642945994 is a wasteful number, since it uses less digits than its factorization.

3642945994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198024.

The product of its digits is 8398080, while the sum is 55.

The square root of 3642945994 is about 60356.8222655898. The cubic root of 3642945994 is about 1538.6892194326.

The spelling of 3642945994 in words is "three billion, six hundred forty-two million, nine hundred forty-five thousand, nine hundred ninety-four".