87251224064 has 20 divisors (see below), whose sum is σ = 174332036604. Its totient is φ = 43625611776.

The previous prime is 87251224057. The next prime is 87251224069. The reversal of 87251224064 is 46042215278.

It is a happy number.

It is a super-2 number, since 2×87251224064² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87251224069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85205762 + ... + 85206785.

Almost surely, 2^87251224064 is an apocalyptic number.

It is an amenable number.

87251224064 is a deficient number, since it is larger than the sum of its proper divisors (87080812540).

87251224064 is an equidigital number, since it uses as much as digits as its factorization.

87251224064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170412565 (or 170412549 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 87251224064 in words is "eighty-seven billion, two hundred fifty-one million, two hundred twenty-four thousand, sixty-four".