13987956471 has 8 divisors (see below), whose sum is σ = 19002507120. Its totient is φ = 9149355072.

The previous prime is 13987956469. The next prime is 13987956481. The reversal of 13987956471 is 17465978931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13987956471 - 2¹ = 13987956469 is a prime.

It is a super-3 number, since 3×13987956471³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987956481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43987126 + ... + 43987443.

It is an arithmetic number, because the mean of its divisors is an integer number (2375313390).

Almost surely, 2^13987956471 is an apocalyptic number.

13987956471 is a deficient number, since it is larger than the sum of its proper divisors (5014550649).

13987956471 is an equidigital number, since it uses as much as digits as its factorization.

13987956471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87974625.

The product of its digits is 11430720, while the sum is 60.

The spelling of 13987956471 in words is "thirteen billion, nine hundred eighty-seven million, nine hundred fifty-six thousand, four hundred seventy-one".