1640441352660 has 48 divisors (see below), whose sum is σ = 5010802679232. Its totient is φ = 397682752000.

The previous prime is 1640441352643. The next prime is 1640441352661. The reversal of 1640441352660 is 662531440461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640441352661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242757941 + ... + 1242759260.

It is an arithmetic number, because the mean of its divisors is an integer number (104391722484).

Almost surely, 2^{1640441352660} is an apocalyptic number.

1640441352660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640441352660 is an abundant number, since it is smaller than the sum of its proper divisors (3370361326572).

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

1640441352660 is a wasteful number, since it uses less digits than its factorization.

1640441352660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485517224 (or 2485517222 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 1640441352660 in words is "one trillion, six hundred forty billion, four hundred forty-one million, three hundred fifty-two thousand, six hundred sixty".