15093947612861 has 4 divisors (see below), whose sum is σ = 16255020506172. Its totient is φ = 13932874719552.

The previous prime is 15093947612839. The next prime is 15093947612927. The reversal of 15093947612861 is 16821674939051.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8665846575961 + 6428101036900 = 2943781^2 + 2535370^2 .

It is a cyclic number.

It is not a de Polignac number, because 15093947612861 - 2²⁶ = 15093880503997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15093947612794 and 15093947612803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15093947012861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580536446636 + ... + 580536446661.

It is an arithmetic number, because the mean of its divisors is an integer number (4063755126543).

It is a 1-persistent number, because it is pandigital, but 2⋅15093947612861 = 30187895225722 is not.

Almost surely, 2^{15093947612861} is an apocalyptic number.

It is an amenable number.

15093947612861 is a deficient number, since it is larger than the sum of its proper divisors (1161072893311).

15093947612861 is a wasteful number, since it uses less digits than its factorization.

15093947612861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161072893310.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 15093947612861 in words is "fifteen trillion, ninety-three billion, nine hundred forty-seven million, six hundred twelve thousand, eight hundred sixty-one".