1943120913615 has 128 divisors (see below), whose sum is σ = 4183677388800. Its totient is φ = 836734510080.

The previous prime is 1943120913577. The next prime is 1943120913631. The reversal of 1943120913615 is 5163190213491.

1943120913615 is a `hidden beast` number, since 1 + 9 + 4 + 3 + 1 + 20 + 9 + 1 + 3 + 615 = 666.

It is not a de Polignac number, because 1943120913615 - 2⁶ = 1943120913551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 258924 + ... + 1988286.

It is an arithmetic number, because the mean of its divisors is an integer number (32684979600).

Almost surely, 2^{1943120913615} is an apocalyptic number.

1943120913615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1943120913615 is an abundant number, since it is smaller than the sum of its proper divisors (2240556475185).

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

1943120913615 is a wasteful number, since it uses less digits than its factorization.

1943120913615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729454 (or 1729448 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 1943120913615 in words is "one trillion, nine hundred forty-three billion, one hundred twenty million, nine hundred thirteen thousand, six hundred fifteen".