1640260665354 has 8 divisors (see below), whose sum is σ = 3280521330720. Its totient is φ = 546753555116.

The previous prime is 1640260665271. The next prime is 1640260665383. The reversal of 1640260665354 is 4535660620461.

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

1640260665354 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136688388774 + ... + 136688388785.

It is an arithmetic number, because the mean of its divisors is an integer number (410065166340).

Almost surely, 2^{1640260665354} is an apocalyptic number.

1640260665354 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1640260665354 is a wasteful number, since it uses less digits than its factorization.

1640260665354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273376777564.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 1640260665354 in words is "one trillion, six hundred forty billion, two hundred sixty million, six hundred sixty-five thousand, three hundred fifty-four".