1640793570 has 64 divisors (see below), whose sum is σ = 4339488384. Its totient is φ = 394490880.

The previous prime is 1640793569. The next prime is 1640793577. The reversal of 1640793570 is 753970461.

1640793570 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1640793577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32151 + ... + 65690.

It is an arithmetic number, because the mean of its divisors is an integer number (67804506).

Almost surely, 2^1640793570 is an apocalyptic number.

1640793570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640793570 is an abundant number, since it is smaller than the sum of its proper divisors (2698694814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640793570 is a wasteful number, since it uses less digits than its factorization.

1640793570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97907.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 1640793570 is about 40506.7101848570. The cubic root of 1640793570 is about 1179.4638879395.

The spelling of 1640793570 in words is "one billion, six hundred forty million, seven hundred ninety-three thousand, five hundred seventy".