243709236376940 has 24 divisors (see below), whose sum is σ = 512034623789472. Its totient is φ = 97436984570240.

The previous prime is 243709236376933. The next prime is 243709236376967. The reversal of 243709236376940 is 49673632907342.

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, 2919331001 + ... + 2919414480.

It is an arithmetic number, because the mean of its divisors is an integer number (21334775991228).

Almost surely, 2^{243709236376940} is an apocalyptic number.

243709236376940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243709236376940 is an abundant number, since it is smaller than the sum of its proper divisors (268325387412532).

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

243709236376940 is a wasteful number, since it uses less digits than its factorization.

243709236376940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838747577 (or 5838747575 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 65.

The spelling of 243709236376940 in words is "two hundred forty-three trillion, seven hundred nine billion, two hundred thirty-six million, three hundred seventy-six thousand, nine hundred forty".