1640951496 has 24 divisors (see below), whose sum is σ = 4444243830. Its totient is φ = 546983808.

The previous prime is 1640951461. The next prime is 1640951563. The reversal of 1640951496 is 6941590461.

It is a happy number.

1640951496 is a `hidden beast` number, since 1 + 6 + 40 + 9 + 514 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1631028996 + 9922500 = 40386^2 + 3150^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11395425 + ... + 11395568.

Almost surely, 2^1640951496 is an apocalyptic number.

It is an amenable number.

1640951496 is an abundant number, since it is smaller than the sum of its proper divisors (2803292334).

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

1640951496 is a wasteful number, since it uses less digits than its factorization.

1640951496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22791005 (or 22790998 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1640951496 is about 40508.6595186758. The cubic root of 1640951496 is about 1179.5017277673.

The spelling of 1640951496 in words is "one billion, six hundred forty million, nine hundred fifty-one thousand, four hundred ninety-six".