1263900250025 has 24 divisors (see below), whose sum is σ = 1791562237440. Its totient is φ = 866463960960.

The previous prime is 1263900250013. The next prime is 1263900250033. The reversal of 1263900250025 is 5200520093621.

It is a de Polignac number, because none of the positive numbers 2^k-1263900250025 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 152780 + ... + 1597229.

It is an arithmetic number, because the mean of its divisors is an integer number (74648426560).

Almost surely, 2^{1263900250025} is an apocalyptic number.

It is an amenable number.

1263900250025 is a deficient number, since it is larger than the sum of its proper divisors (527661987415).

1263900250025 is a wasteful number, since it uses less digits than its factorization.

1263900250025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754153 (or 1754148 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 1263900250025 in words is "one trillion, two hundred sixty-three billion, nine hundred million, two hundred fifty thousand, twenty-five".