1253869434779 has 8 divisors (see below), whose sum is σ = 1350339157440. Its totient is φ = 1157402316096.

The previous prime is 1253869434761. The next prime is 1253869434799. The reversal of 1253869434779 is 9774349683521.

It is a happy number.

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

It is not a de Polignac number, because 1253869434779 - 2⁸ = 1253869434523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253869434799) 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, 413582 + ... + 1636700.

It is an arithmetic number, because the mean of its divisors is an integer number (168792394680).

Almost surely, 2^{1253869434779} is an apocalyptic number.

1253869434779 is a deficient number, since it is larger than the sum of its proper divisors (96469722661).

1253869434779 is a wasteful number, since it uses less digits than its factorization.

1253869434779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301989.

The product of its digits is 274337280, while the sum is 68.

The spelling of 1253869434779 in words is "one trillion, two hundred fifty-three billion, eight hundred sixty-nine million, four hundred thirty-four thousand, seven hundred seventy-nine".