1640773870 has 16 divisors (see below), whose sum is σ = 3127122288. Its totient is φ = 617703040.

The previous prime is 1640773817. The next prime is 1640773879. The reversal of 1640773870 is 783770461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640773879) 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, 4825636 + ... + 4825975.

It is an arithmetic number, because the mean of its divisors is an integer number (195445143).

Almost surely, 2^1640773870 is an apocalyptic number.

1640773870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640773870 is a deficient number, since it is larger than the sum of its proper divisors (1486348418).

1640773870 is a wasteful number, since it uses less digits than its factorization.

1640773870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651635.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 1640773870 is about 40506.4670145398. The cubic root of 1640773870 is about 1179.4591675546.

The spelling of 1640773870 in words is "one billion, six hundred forty million, seven hundred seventy-three thousand, eight hundred seventy".