87315490261 has 4 divisors (see below), whose sum is σ = 91911042400. Its totient is φ = 82719938124.

The previous prime is 87315490211. The next prime is 87315490303. The reversal of 87315490261 is 16209451378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87315490261 - 2¹³ = 87315482069 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 (87315490211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2297776041 + ... + 2297776078.

It is an arithmetic number, because the mean of its divisors is an integer number (22977760600).

It is a 2-persistent number, because it is pandigital, and so is 2⋅87315490261 = 174630980522, but 3⋅87315490261 = 261946470783 is not.

Almost surely, 2^87315490261 is an apocalyptic number.

It is an amenable number.

87315490261 is a deficient number, since it is larger than the sum of its proper divisors (4595552139).

87315490261 is a wasteful number, since it uses less digits than its factorization.

87315490261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595552138.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 87315490261 in words is "eighty-seven billion, three hundred fifteen million, four hundred ninety thousand, two hundred sixty-one".