2391318751440 has 80 divisors (see below), whose sum is σ = 7414758425088. Its totient is φ = 637541319168.

The previous prime is 2391318751403. The next prime is 2391318751469. The reversal of 2391318751440 is 441578131932.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2391318751440.

It is a congruent number.

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, 53007 + ... + 2187566.

Almost surely, 2^{2391318751440} is an apocalyptic number.

2391318751440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2391318751440 is an abundant number, since it is smaller than the sum of its proper divisors (5023439673648).

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

2391318751440 is a wasteful number, since it uses less digits than its factorization.

2391318751440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245036 (or 2245030 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 2391318751440 in words is "two trillion, three hundred ninety-one billion, three hundred eighteen million, seven hundred fifty-one thousand, four hundred forty".