1340615666390 has 64 divisors (see below), whose sum is σ = 3239977466880. Its totient is φ = 385711597440.

The previous prime is 1340615666389. The next prime is 1340615666437. The reversal of 1340615666390 is 936665160431.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66953810 + ... + 66973829.

It is an arithmetic number, because the mean of its divisors is an integer number (50624647920).

Almost surely, 2^{1340615666390} is an apocalyptic number.

1340615666390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340615666390 is an abundant number, since it is smaller than the sum of its proper divisors (1899361800490).

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

1340615666390 is a wasteful number, since it uses less digits than its factorization.

1340615666390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133927677.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 1340615666390 in words is "one trillion, three hundred forty billion, six hundred fifteen million, six hundred sixty-six thousand, three hundred ninety".