1540641377640 has 64 divisors (see below), whose sum is σ = 4624800831360. Its totient is φ = 410581994240.

The previous prime is 1540641377633. The next prime is 1540641377669. The reversal of 1540641377640 is 467731460451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540641377640.

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, 3801771 + ... + 4187450.

It is an arithmetic number, because the mean of its divisors is an integer number (72262512990).

Almost surely, 2^{1540641377640} is an apocalyptic number.

1540641377640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540641377640 is an abundant number, since it is smaller than the sum of its proper divisors (3084159453720).

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

1540641377640 is a wasteful number, since it uses less digits than its factorization.

1540641377640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7990842 (or 7990838 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 1540641377640 in words is "one trillion, five hundred forty billion, six hundred forty-one million, three hundred seventy-seven thousand, six hundred forty".