265942364415 has 128 divisors (see below), whose sum is σ = 554892871680. Its totient is φ = 105547235328.

The previous prime is 265942364399. The next prime is 265942364491. The reversal of 265942364415 is 514463249562.

It is a Cunningham number, because it is equal to 515696²-1.

It is not a de Polignac number, because 265942364415 - 2⁴ = 265942364399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 43831212 + ... + 43837278.

It is an arithmetic number, because the mean of its divisors is an integer number (4335100560).

Almost surely, 2^265942364415 is an apocalyptic number.

265942364415 is an abundant number, since it is smaller than the sum of its proper divisors (288950507265).

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

265942364415 is a wasteful number, since it uses less digits than its factorization.

265942364415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001.

The product of its digits is 6220800, while the sum is 51.

The spelling of 265942364415 in words is "two hundred sixty-five billion, nine hundred forty-two million, three hundred sixty-four thousand, four hundred fifteen".