15538298949 has 24 divisors (see below), whose sum is σ = 22610078712. Its totient is φ = 10282446720.

The previous prime is 15538298947. The next prime is 15538298989. The reversal of 15538298949 is 94989283551.

15538298949 is a `hidden beast` number, since 1 + 5 + 538 + 2 + 9 + 8 + 94 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5758077924 + 9780221025 = 75882^2 + 98895^2 .

It is not a de Polignac number, because 15538298949 - 2¹ = 15538298947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15538298947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1539379 + ... + 1549439.

It is an arithmetic number, because the mean of its divisors is an integer number (942086613).

Almost surely, 2^15538298949 is an apocalyptic number.

It is an amenable number.

15538298949 is a deficient number, since it is larger than the sum of its proper divisors (7071779763).

15538298949 is a wasteful number, since it uses less digits than its factorization.

15538298949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11317 (or 11314 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 63.

The spelling of 15538298949 in words is "fifteen billion, five hundred thirty-eight million, two hundred ninety-eight thousand, nine hundred forty-nine".