15211601061887 has 4 divisors (see below), whose sum is σ = 15211633044216. Its totient is φ = 15211569079560.

The previous prime is 15211601061883. The next prime is 15211601061931. The reversal of 15211601061887 is 78816010611251.

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

It is a cyclic number.

It is not a de Polignac number, because 15211601061887 - 2² = 15211601061883 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 (15211601061883) 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, 15266789 + ... + 16232622.

It is an arithmetic number, because the mean of its divisors is an integer number (3802908261054).

Almost surely, 2^{15211601061887} is an apocalyptic number.

15211601061887 is a deficient number, since it is larger than the sum of its proper divisors (31982329).

15211601061887 is an equidigital number, since it uses as much as digits as its factorization.

15211601061887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31982328.

The product of its (nonzero) digits is 161280, while the sum is 47.

The spelling of 15211601061887 in words is "fifteen trillion, two hundred eleven billion, six hundred one million, sixty-one thousand, eight hundred eighty-seven".