640411164365 has 16 divisors (see below), whose sum is σ = 889395617280. Its totient is φ = 433580359680.

The previous prime is 640411164359. The next prime is 640411164461. The reversal of 640411164365 is 563461114046.

It is a happy number.

It is not a de Polignac number, because 640411164365 - 2¹⁶ = 640411098829 is a prime.

It is a congruent number.

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, 115803956 + ... + 115809485.

It is an arithmetic number, because the mean of its divisors is an integer number (55587226080).

Almost surely, 2^640411164365 is an apocalyptic number.

It is an amenable number.

640411164365 is a deficient number, since it is larger than the sum of its proper divisors (248984452915).

640411164365 is a wasteful number, since it uses less digits than its factorization.

640411164365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231613532.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 640411164365 in words is "six hundred forty billion, four hundred eleven million, one hundred sixty-four thousand, three hundred sixty-five".