263013401675661 has 64 divisors (see below), whose sum is σ = 437708840153088. Its totient is φ = 136779424823808.

The previous prime is 263013401675611. The next prime is 263013401675663. The reversal of 263013401675661 is 166576104310362.

It is not a de Polignac number, because 263013401675661 - 2²¹ = 263013399578509 is a prime.

It is a super-2 number, since 2×263013401675661² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263013401675663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 882376 + ... + 22952241.

It is an arithmetic number, because the mean of its divisors is an integer number (6839200627392).

Almost surely, 2^{263013401675661} is an apocalyptic number.

263013401675661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

263013401675661 is a deficient number, since it is larger than the sum of its proper divisors (174695438477427).

263013401675661 is a wasteful number, since it uses less digits than its factorization.

263013401675661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23835210.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 263013401675661 in words is "two hundred sixty-three trillion, thirteen billion, four hundred one million, six hundred seventy-five thousand, six hundred sixty-one".