249201972965 has 16 divisors (see below), whose sum is σ = 326368037376. Its totient is φ = 181160020800.

The previous prime is 249201972959. The next prime is 249201972991. The reversal of 249201972965 is 569279102942.

It is not a de Polignac number, because 249201972965 - 2⁸ = 249201972709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249201972965.

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, 842741 + ... + 1099370.

It is an arithmetic number, because the mean of its divisors is an integer number (20398002336).

Almost surely, 2^249201972965 is an apocalyptic number.

It is an amenable number.

249201972965 is a deficient number, since it is larger than the sum of its proper divisors (77166064411).

249201972965 is a wasteful number, since it uses less digits than its factorization.

249201972965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944460.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 249201972965 in words is "two hundred forty-nine billion, two hundred one million, nine hundred seventy-two thousand, nine hundred sixty-five".