1640397177759 has 8 divisors (see below), whose sum is σ = 2190238237440. Its totient is φ = 1092077118296.

The previous prime is 1640397177743. The next prime is 1640397177763. The reversal of 1640397177759 is 9577717930461.

It is a happy number.

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 1640397177759 - 2⁴ = 1640397177743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1640397177759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640397177739) 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, 380247537 + ... + 380251850.

It is an arithmetic number, because the mean of its divisors is an integer number (273779779680).

Almost surely, 2^{1640397177759} is an apocalyptic number.

1640397177759 is a deficient number, since it is larger than the sum of its proper divisors (549841059681).

1640397177759 is an equidigital number, since it uses as much as digits as its factorization.

1640397177759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760500109.

The product of its (nonzero) digits is 70013160, while the sum is 66.

The spelling of 1640397177759 in words is "one trillion, six hundred forty billion, three hundred ninety-seven million, one hundred seventy-seven thousand, seven hundred fifty-nine".