1640140345340 has 24 divisors (see below), whose sum is σ = 3936336829152. Its totient is φ = 562333832640.

The previous prime is 1640140345309. The next prime is 1640140345351. The reversal of 1640140345340 is 435430410461.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1640140345340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5857643951 + ... + 5857644230.

It is an arithmetic number, because the mean of its divisors is an integer number (164014034548).

Almost surely, 2^{1640140345340} is an apocalyptic number.

1640140345340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640140345340 is an abundant number, since it is smaller than the sum of its proper divisors (2296196483812).

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

1640140345340 is a wasteful number, since it uses less digits than its factorization.

1640140345340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715288197 (or 11715288195 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 1640140345340 in words is "one trillion, six hundred forty billion, one hundred forty million, three hundred forty-five thousand, three hundred forty".