1828015399397 has 4 divisors (see below), whose sum is σ = 1994198617536. Its totient is φ = 1661832181260.

The previous prime is 1828015399381. The next prime is 1828015399403. The reversal of 1828015399397 is 7939935108281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1828015399397 - 2⁴ = 1828015399381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828015399307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83091609053 + ... + 83091609074.

It is an arithmetic number, because the mean of its divisors is an integer number (498549654384).

Almost surely, 2^{1828015399397} is an apocalyptic number.

It is an amenable number.

1828015399397 is a deficient number, since it is larger than the sum of its proper divisors (166183218139).

1828015399397 is a wasteful number, since it uses less digits than its factorization.

1828015399397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166183218138.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 1828015399397 in words is "one trillion, eight hundred twenty-eight billion, fifteen million, three hundred ninety-nine thousand, three hundred ninety-seven".