1250261663640 has 128 divisors (see below), whose sum is σ = 4232860934400. Its totient is φ = 292642219520.

The previous prime is 1250261663603. The next prime is 1250261663719. The reversal of 1250261663640 is 463661620521.

It is a junction number, because it is equal to n+sod(n) for n = 1250261663592 and 1250261663601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16292202 + ... + 16368761.

It is an arithmetic number, because the mean of its divisors is an integer number (33069226050).

Almost surely, 2^{1250261663640} is an apocalyptic number.

1250261663640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250261663640 is an abundant number, since it is smaller than the sum of its proper divisors (2982599270760).

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

1250261663640 is a wasteful number, since it uses less digits than its factorization.

1250261663640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32661017 (or 32661013 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 1250261663640 in words is "one trillion, two hundred fifty billion, two hundred sixty-one million, six hundred sixty-three thousand, six hundred forty".