1640520146 has 16 divisors (see below), whose sum is σ = 2472120000. Its totient is φ = 816489168.

The previous prime is 1640520137. The next prime is 1640520181. The reversal of 1640520146 is 6410250461.

It is a super-2 number, since 2×1640520146² = 5382612698863722632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467105 + ... + 470603.

It is an arithmetic number, because the mean of its divisors is an integer number (154507500).

Almost surely, 2^1640520146 is an apocalyptic number.

1640520146 is a deficient number, since it is larger than the sum of its proper divisors (831599854).

1640520146 is a wasteful number, since it uses less digits than its factorization.

1640520146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1640520146 is about 40503.3349984912. The cubic root of 1640520146 is about 1179.3983684951.

The spelling of 1640520146 in words is "one billion, six hundred forty million, five hundred twenty thousand, one hundred forty-six".