1578611794749 has 12 divisors (see below), whose sum is σ = 2313557782368. Its totient is φ = 956734420840.

The previous prime is 1578611794693. The next prime is 1578611794801. The reversal of 1578611794749 is 9474971168751.

It is a happy number.

It is not a de Polignac number, because 1578611794749 - 2⁸ = 1578611794493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578611794849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2174396049 + ... + 2174396774.

It is an arithmetic number, because the mean of its divisors is an integer number (192796481864).

Almost surely, 2^{1578611794749} is an apocalyptic number.

It is an amenable number.

1578611794749 is a deficient number, since it is larger than the sum of its proper divisors (734945987619).

1578611794749 is a wasteful number, since it uses less digits than its factorization.

1578611794749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348792848 (or 4348792837 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 69.

The spelling of 1578611794749 in words is "one trillion, five hundred seventy-eight billion, six hundred eleven million, seven hundred ninety-four thousand, seven hundred forty-nine".