1640896426 has 32 divisors (see below), whose sum is σ = 2740465728. Its totient is φ = 732049920.

The previous prime is 1640896417. The next prime is 1640896501. The reversal of 1640896426 is 6246980461.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100881 + ... + 116011.

It is an arithmetic number, because the mean of its divisors is an integer number (85639554).

Almost surely, 2^1640896426 is an apocalyptic number.

1640896426 is a deficient number, since it is larger than the sum of its proper divisors (1099569302).

1640896426 is a wasteful number, since it uses less digits than its factorization.

1640896426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15286.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1640896426 is about 40507.9797817665. The cubic root of 1640896426 is about 1179.4885330066.

The spelling of 1640896426 in words is "one billion, six hundred forty million, eight hundred ninety-six thousand, four hundred twenty-six".