1268757511370 has 16 divisors (see below), whose sum is σ = 2283978897000. Its totient is φ = 507455143104.

The previous prime is 1268757511339. The next prime is 1268757511381. The reversal of 1268757511370 is 731157578621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1251259248409 + 17498262961 = 1118597^2 + 132281^2 .

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, 5871245 + ... + 6083504.

Almost surely, 2^{1268757511370} is an apocalyptic number.

1268757511370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1268757511370 is a deficient number, since it is larger than the sum of its proper divisors (1015221385630).

1268757511370 is a wasteful number, since it uses less digits than its factorization.

1268757511370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11965369.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 1268757511370 in words is "one trillion, two hundred sixty-eight billion, seven hundred fifty-seven million, five hundred eleven thousand, three hundred seventy".