1640276057 has 8 divisors (see below), whose sum is σ = 1893162432. Its totient is φ = 1392030000.

The previous prime is 1640276041. The next prime is 1640276063. The reversal of 1640276057 is 7506720461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1640276057 - 2⁴ = 1640276041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1640276057.

It is not an unprimeable number, because it can be changed into a prime (1640276017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159319 + ... + 1160732.

It is an arithmetic number, because the mean of its divisors is an integer number (236645304).

Almost surely, 2^1640276057 is an apocalyptic number.

It is an amenable number.

1640276057 is a deficient number, since it is larger than the sum of its proper divisors (252886375).

1640276057 is a wasteful number, since it uses less digits than its factorization.

1640276057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320159.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 1640276057 is about 40500.3216900804. The cubic root of 1640276057 is about 1179.3398723228.

The spelling of 1640276057 in words is "one billion, six hundred forty million, two hundred seventy-six thousand, fifty-seven".