1640254412 has 12 divisors (see below), whose sum is σ = 2889455856. Its totient is φ = 814695600.

The previous prime is 1640254411. The next prime is 1640254501. The reversal of 1640254412 is 2144520461.

It is not an unprimeable number, because it can be changed into a prime (1640254411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1357223 + ... + 1358430.

It is an arithmetic number, because the mean of its divisors is an integer number (240787988).

Almost surely, 2^1640254412 is an apocalyptic number.

It is an amenable number.

1640254412 is a deficient number, since it is larger than the sum of its proper divisors (1249201444).

1640254412 is a wasteful number, since it uses less digits than its factorization.

1640254412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715808 (or 2715806 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1640254412 is about 40500.0544690992. The cubic root of 1640254412 is about 1179.3346847969.

Adding to 1640254412 its reverse (2144520461), we get a palindrome (3784774873).

The spelling of 1640254412 in words is "one billion, six hundred forty million, two hundred fifty-four thousand, four hundred twelve".