15661676614431 has 16 divisors (see below), whose sum is σ = 21887872505856. Its totient is φ = 9942370638816.

The previous prime is 15661676614417. The next prime is 15661676614511. The reversal of 15661676614431 is 13441667616651.

It is not a de Polignac number, because 15661676614431 - 2¹³ = 15661676606239 is a prime.

It is a super-2 number, since 2×15661676614431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15661676614411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508910220 + ... + 508940993.

It is an arithmetic number, because the mean of its divisors is an integer number (1367992031616).

Almost surely, 2^{15661676614431} is an apocalyptic number.

15661676614431 is a deficient number, since it is larger than the sum of its proper divisors (6226195891425).

15661676614431 is a wasteful number, since it uses less digits than its factorization.

15661676614431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017851462.

The product of its digits is 13063680, while the sum is 57.

The spelling of 15661676614431 in words is "fifteen trillion, six hundred sixty-one billion, six hundred seventy-six million, six hundred fourteen thousand, four hundred thirty-one".