15271981653 has 16 divisors (see below), whose sum is σ = 21073049280. Its totient is φ = 9826392576.

The previous prime is 15271981619. The next prime is 15271981663. The reversal of 15271981653 is 35618917251.

It is not a de Polignac number, because 15271981653 - 2⁶ = 15271981589 is a prime.

It is a super-2 number, since 2×15271981653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15271981663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198126 + ... + 264192.

It is an arithmetic number, because the mean of its divisors is an integer number (1317065580).

Almost surely, 2^15271981653 is an apocalyptic number.

It is an amenable number.

15271981653 is a deficient number, since it is larger than the sum of its proper divisors (5801067627).

15271981653 is a wasteful number, since it uses less digits than its factorization.

15271981653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68756.

The product of its digits is 453600, while the sum is 48.

The spelling of 15271981653 in words is "fifteen billion, two hundred seventy-one million, nine hundred eighty-one thousand, six hundred fifty-three".