15485944377 has 4 divisors (see below), whose sum is σ = 20647925840. Its totient is φ = 10323962916.

The previous prime is 15485944343. The next prime is 15485944379. The reversal of 15485944377 is 77344958451.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77344958451 = 3 ⋅25781652817.

It is not a de Polignac number, because 15485944377 - 2⁸ = 15485944121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15485944379) 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, 2580990727 + ... + 2580990732.

It is an arithmetic number, because the mean of its divisors is an integer number (5161981460).

Almost surely, 2^15485944377 is an apocalyptic number.

It is an amenable number.

15485944377 is a deficient number, since it is larger than the sum of its proper divisors (5161981463).

15485944377 is an equidigital number, since it uses as much as digits as its factorization.

15485944377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161981462.

The product of its digits is 16934400, while the sum is 57.

The spelling of 15485944377 in words is "fifteen billion, four hundred eighty-five million, nine hundred forty-four thousand, three hundred seventy-seven".