15512455421551 has 8 divisors (see below), whose sum is σ = 17080834518144. Its totient is φ = 13970435637720.

The previous prime is 15512455421513. The next prime is 15512455421623.

15512455421551 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 15512455421551 - 2²¹ = 15512453324399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15512455461551) 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, 6589826955 + ... + 6589829308.

It is an arithmetic number, because the mean of its divisors is an integer number (2135104314768).

Almost surely, 2^{15512455421551} is an apocalyptic number.

15512455421551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15512455421551 is a deficient number, since it is larger than the sum of its proper divisors (1568379096593).

15512455421551 is a wasteful number, since it uses less digits than its factorization.

15512455421551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13179656381.

The product of its digits is 1000000, while the sum is 46.

It can be divided in two parts, 1551245 and 5421551, that added together give a palindrome (6972796).

The spelling of 15512455421551 in words is "fifteen trillion, five hundred twelve billion, four hundred fifty-five million, four hundred twenty-one thousand, five hundred fifty-one".