261875649023999 has 32 divisors (see below), whose sum is σ = 275983384800000. Its totient is φ = 248142208333824.

The previous prime is 261875649023971. The next prime is 261875649024023. The reversal of 261875649023999 is 999320946578162.

It is a cyclic number.

It is not a de Polignac number, because 261875649023999 - 2¹⁶ = 261875648958463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261875649023939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 803139002 + ... + 803465000.

It is an arithmetic number, because the mean of its divisors is an integer number (8624480775000).

It is a 1-persistent number, because it is pandigital, but 2⋅261875649023999 = 523751298047998 is not.

Almost surely, 2^{261875649023999} is an apocalyptic number.

261875649023999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

261875649023999 is a deficient number, since it is larger than the sum of its proper divisors (14107735776001).

261875649023999 is a wasteful number, since it uses less digits than its factorization.

261875649023999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327987.

The product of its (nonzero) digits is 3174474240, while the sum is 80.

The spelling of 261875649023999 in words is "two hundred sixty-one trillion, eight hundred seventy-five billion, six hundred forty-nine million, twenty-three thousand, nine hundred ninety-nine".