1252761199979 has 8 divisors (see below), whose sum is σ = 1288685885760. Its totient is φ = 1217092206400.

The previous prime is 1252761199927. The next prime is 1252761199993. The reversal of 1252761199979 is 9799911672521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252761199979 - 2²⁴ = 1252744422763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252761129979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63913112 + ... + 63932709.

It is an arithmetic number, because the mean of its divisors is an integer number (161085735720).

Almost surely, 2^{1252761199979} is an apocalyptic number.

1252761199979 is a deficient number, since it is larger than the sum of its proper divisors (35924685781).

1252761199979 is a wasteful number, since it uses less digits than its factorization.

1252761199979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127846101.

The product of its digits is 38578680, while the sum is 68.

The spelling of 1252761199979 in words is "one trillion, two hundred fifty-two billion, seven hundred sixty-one million, one hundred ninety-nine thousand, nine hundred seventy-nine".