1640167705 has 48 divisors (see below), whose sum is σ = 2249134272. Its totient is φ = 1146499200.

The previous prime is 1640167693. The next prime is 1640167741. The reversal of 1640167705 is 5077610461.

It is not a de Polignac number, because 1640167705 - 2⁵ = 1640167673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1742535 + ... + 1743475.

It is an arithmetic number, because the mean of its divisors is an integer number (46856964).

Almost surely, 2^1640167705 is an apocalyptic number.

It is an amenable number.

1640167705 is a deficient number, since it is larger than the sum of its proper divisors (608966567).

1640167705 is a wasteful number, since it uses less digits than its factorization.

1640167705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1640167705 is about 40498.9839996018. The cubic root of 1640167705 is about 1179.3139037982.

The spelling of 1640167705 in words is "one billion, six hundred forty million, one hundred sixty-seven thousand, seven hundred five".