1578797690052 has 48 divisors (see below), whose sum is σ = 4255155277632. Its totient is φ = 450280980480.

The previous prime is 1578797690047. The next prime is 1578797690089. The reversal of 1578797690052 is 2500967978751.

It is a happy number.

It is a super-2 number, since 2×1578797690052² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351779773 + ... + 351784260.

It is an arithmetic number, because the mean of its divisors is an integer number (88649068284).

Almost surely, 2^{1578797690052} is an apocalyptic number.

1578797690052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1578797690052 is an abundant number, since it is smaller than the sum of its proper divisors (2676357587580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1578797690052 is a wasteful number, since it uses less digits than its factorization.

1578797690052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703564068 (or 703564066 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 66.

The spelling of 1578797690052 in words is "one trillion, five hundred seventy-eight billion, seven hundred ninety-seven million, six hundred ninety thousand, fifty-two".