1265787625984 has 160 divisors (see below), whose sum is σ = 3017789634816. Its totient is φ = 518599065600.

The previous prime is 1265787625967. The next prime is 1265787626107. The reversal of 1265787625984 is 4895267875621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200883634 + ... + 200889934.

Almost surely, 2^{1265787625984} is an apocalyptic number.

1265787625984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265787625984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508894817408).

1265787625984 is an abundant number, since it is smaller than the sum of its proper divisors (1752002008832).

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

1265787625984 is an equidigital number, since it uses as much as digits as its factorization.

1265787625984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8786 (or 8770 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 70.

The spelling of 1265787625984 in words is "one trillion, two hundred sixty-five billion, seven hundred eighty-seven million, six hundred twenty-five thousand, nine hundred eighty-four".