263561017290 has 64 divisors (see below), whose sum is σ = 634676065920. Its totient is φ = 70046484480.

The previous prime is 263561017283. The next prime is 263561017297. The reversal of 263561017290 is 92710165362.

It is an interprime number because it is at equal distance from previous prime (263561017283) and next prime (263561017297).

It is not an unprimeable number, because it can be changed into a prime (263561017297) 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, 43055430 + ... + 43061550.

It is an arithmetic number, because the mean of its divisors is an integer number (9916813530).

Almost surely, 2^263561017290 is an apocalyptic number.

263561017290 is an abundant number, since it is smaller than the sum of its proper divisors (371115048630).

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

263561017290 is a wasteful number, since it uses less digits than its factorization.

263561017290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10727.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 263561017290 in words is "two hundred sixty-three billion, five hundred sixty-one million, seventeen thousand, two hundred ninety".