15487434821649 has 12 divisors (see below), whose sum is σ = 24021327478704. Its totient is φ = 8849962755144.

The previous prime is 15487434821549. The next prime is 15487434821653. The reversal of 15487434821649 is 94612843478451.

It is not a de Polignac number, because 15487434821649 - 2¹³ = 15487434813457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15487434821649.

It is not an unprimeable number, because it can be changed into a prime (15487434821659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52678349587 + ... + 52678349880.

It is an arithmetic number, because the mean of its divisors is an integer number (2001777289892).

Almost surely, 2^{15487434821649} is an apocalyptic number.

It is an amenable number.

15487434821649 is a deficient number, since it is larger than the sum of its proper divisors (8533892657055).

15487434821649 is a wasteful number, since it uses less digits than its factorization.

15487434821649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105356699484 (or 105356699477 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 66.

The spelling of 15487434821649 in words is "fifteen trillion, four hundred eighty-seven billion, four hundred thirty-four million, eight hundred twenty-one thousand, six hundred forty-nine".