265220303616 has 180 divisors, whose sum is σ = 805763784672. Its totient is φ = 86738356224.

The previous prime is 265220303603. The next prime is 265220303633. The reversal of 265220303616 is 616303022562.

265220303616 is a `hidden beast` number, since 2 + 6 + 5 + 2 + 2 + 0 + 30 + 3 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 978345 + ... + 1219671.

Almost surely, 2^265220303616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265220303616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402881892336).

265220303616 is an abundant number, since it is smaller than the sum of its proper divisors (540543481056).

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

265220303616 is an equidigital number, since it uses as much as digits as its factorization.

265220303616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241408 (or 241385 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 265220303616 in words is "two hundred sixty-five billion, two hundred twenty million, three hundred three thousand, six hundred sixteen".