87736736251 has 8 divisors (see below), whose sum is σ = 87805343808. Its totient is φ = 87668160000.

The previous prime is 87736736237. The next prime is 87736736317. The reversal of 87736736251 is 15263763778.

It is a happy number.

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 87736736251 - 2⁹ = 87736735739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87736736192 and 87736736201.

It is not an unprimeable number, because it can be changed into a prime (87736736231) 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, 9448731 + ... + 9458011.

It is an arithmetic number, because the mean of its divisors is an integer number (10975667976).

Almost surely, 2^87736736251 is an apocalyptic number.

87736736251 is a deficient number, since it is larger than the sum of its proper divisors (68607557).

87736736251 is a wasteful number, since it uses less digits than its factorization.

87736736251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15653.

The product of its digits is 8890560, while the sum is 55.

The spelling of 87736736251 in words is "eighty-seven billion, seven hundred thirty-six million, seven hundred thirty-six thousand, two hundred fifty-one".