15778472748493 has 32 divisors (see below), whose sum is σ = 19430822039552. Its totient is φ = 12476892542400.

The previous prime is 15778472748443. The next prime is 15778472748499. The reversal of 15778472748493 is 39484727487751.

It is not a de Polignac number, because 15778472748493 - 2²⁵ = 15778439194061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15778472748499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1758826498 + ... + 1758835468.

It is an arithmetic number, because the mean of its divisors is an integer number (607213188736).

Almost surely, 2^{15778472748493} is an apocalyptic number.

15778472748493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15778472748493 is a deficient number, since it is larger than the sum of its proper divisors (3652349291059).

15778472748493 is a wasteful number, since it uses less digits than its factorization.

15778472748493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17945.

The product of its digits is 2655313920, while the sum is 76.

The spelling of 15778472748493 in words is "fifteen trillion, seven hundred seventy-eight billion, four hundred seventy-two million, seven hundred forty-eight thousand, four hundred ninety-three".