1252761199965 has 96 divisors (see below), whose sum is σ = 2378560204800. Its totient is φ = 604916707200.

The previous prime is 1252761199927. The next prime is 1252761199993. The reversal of 1252761199965 is 5699911672521.

1252761199965 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 7 + 611 + 9 + 9 + 9 + 6 + 5 = 666.

It is not a de Polignac number, because 1252761199965 - 2²³ = 1252752811357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 127788754 + ... + 127798556.

It is an arithmetic number, because the mean of its divisors is an integer number (24776668800).

Almost surely, 2^{1252761199965} is an apocalyptic number.

1252761199965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252761199965 is a deficient number, since it is larger than the sum of its proper divisors (1125799004835).

1252761199965 is a wasteful number, since it uses less digits than its factorization.

1252761199965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10855 (or 10852 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 63.

The spelling of 1252761199965 in words is "one trillion, two hundred fifty-two billion, seven hundred sixty-one million, one hundred ninety-nine thousand, nine hundred sixty-five".