263540362140 has 72 divisors (see below), whose sum is σ = 872079023088. Its totient is φ = 63888572160.

The previous prime is 263540362117. The next prime is 263540362159. The reversal of 263540362140 is 41263045362.

263540362140 is a `hidden beast` number, since 2 + 6 + 35 + 403 + 6 + 214 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 263540362095 and 263540362104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66548617 + ... + 66552576.

It is an arithmetic number, because the mean of its divisors is an integer number (12112208654).

Almost surely, 2^263540362140 is an apocalyptic number.

263540362140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263540362140 is an abundant number, since it is smaller than the sum of its proper divisors (608538660948).

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

263540362140 is a wasteful number, since it uses less digits than its factorization.

263540362140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133101219 (or 133101214 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 263540362140 in words is "two hundred sixty-three billion, five hundred forty million, three hundred sixty-two thousand, one hundred forty".