15665116622054 has 4 divisors (see below), whose sum is σ = 23497674933084. Its totient is φ = 7832558311026.

The previous prime is 15665116622053. The next prime is 15665116622087. The reversal of 15665116622054 is 45022661156651.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 15665116621993 and 15665116622011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15665116622053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3916279155512 + ... + 3916279155515.

It is an arithmetic number, because the mean of its divisors is an integer number (5874418733271).

Almost surely, 2^{15665116622054} is an apocalyptic number.

15665116622054 is a deficient number, since it is larger than the sum of its proper divisors (7832558311030).

15665116622054 is an equidigital number, since it uses as much as digits as its factorization.

15665116622054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832558311029.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 15665116622054 in words is "fifteen trillion, six hundred sixty-five billion, one hundred sixteen million, six hundred twenty-two thousand, fifty-four".