1265640010790 has 32 divisors (see below), whose sum is σ = 2291975551584. Its totient is φ = 503190455040.

The previous prime is 1265640010771. The next prime is 1265640010847. The reversal of 1265640010790 is 970100465621.

It is a super-2 number, since 2×1265640010790² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201082 + ... + 1993458.

It is an arithmetic number, because the mean of its divisors is an integer number (71624235987).

Almost surely, 2^{1265640010790} is an apocalyptic number.

1265640010790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265640010790 is a deficient number, since it is larger than the sum of its proper divisors (1026335540794).

1265640010790 is a wasteful number, since it uses less digits than its factorization.

1265640010790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793352.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 1265640010790 in words is "one trillion, two hundred sixty-five billion, six hundred forty million, ten thousand, seven hundred ninety".