87150199981 has 8 divisors (see below), whose sum is σ = 93856662144. Its totient is φ = 80444109360.

The previous prime is 87150199949. The next prime is 87150199987. The reversal of 87150199981 is 18999105178.

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 87150199981 - 2⁵ = 87150199949 is a prime.

It is a super-2 number, since 2×87150199981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87150199987) 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, 569040 + ... + 705766.

It is an arithmetic number, because the mean of its divisors is an integer number (11732082768).

Almost surely, 2^87150199981 is an apocalyptic number.

It is an amenable number.

87150199981 is a deficient number, since it is larger than the sum of its proper divisors (6706462163).

87150199981 is a wasteful number, since it uses less digits than its factorization.

87150199981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185771.

The product of its (nonzero) digits is 1632960, while the sum is 58.

The spelling of 87150199981 in words is "eighty-seven billion, one hundred fifty million, one hundred ninety-nine thousand, nine hundred eighty-one".