15745397820 has 96 divisors (see below), whose sum is σ = 44614402560. Its totient is φ = 4148739840.

The previous prime is 15745397803. The next prime is 15745397821. The reversal of 15745397820 is 2879354751.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15745397821) 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, 3031786 + ... + 3036974.

It is an arithmetic number, because the mean of its divisors is an integer number (464733360).

Almost surely, 2^15745397820 is an apocalyptic number.

15745397820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15745397820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22307201280).

15745397820 is an abundant number, since it is smaller than the sum of its proper divisors (28869004740).

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

15745397820 is a wasteful number, since it uses less digits than its factorization.

15745397820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795 (or 5793 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 15745397820 in words is "fifteen billion, seven hundred forty-five million, three hundred ninety-seven thousand, eight hundred twenty".