263425034532640 has 48 divisors (see below), whose sum is σ = 622479423440952. Its totient is φ = 105346686091264.

The previous prime is 263425034532601. The next prime is 263425034532713. The reversal of 263425034532640 is 46235430524362.

It can be written as a sum of positive squares in 4 ways, for example, as 73900362427024 + 189524672105616 = 8596532^2 + 13766796^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181522849 + ... + 182968288.

Almost surely, 2^{263425034532640} is an apocalyptic number.

263425034532640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263425034532640 is an abundant number, since it is smaller than the sum of its proper divisors (359054388908312).

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

263425034532640 is a wasteful number, since it uses less digits than its factorization.

263425034532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364495669 (or 364495661 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 49.

The spelling of 263425034532640 in words is "two hundred sixty-three trillion, four hundred twenty-five billion, thirty-four million, five hundred thirty-two thousand, six hundred forty".