87904117481 has 8 divisors (see below), whose sum is σ = 92546966400. Its totient is φ = 83262900240.

The previous prime is 87904117447. The next prime is 87904117493. The reversal of 87904117481 is 18471140978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87904117481 is a prime.

It is a super-2 number, since 2×87904117481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87904117981) 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, 296546 + ... + 513563.

It is an arithmetic number, because the mean of its divisors is an integer number (11568370800).

Almost surely, 2^87904117481 is an apocalyptic number.

It is an amenable number.

87904117481 is a deficient number, since it is larger than the sum of its proper divisors (4642848919).

87904117481 is a wasteful number, since it uses less digits than its factorization.

87904117481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815839.

The product of its (nonzero) digits is 451584, while the sum is 50.

The spelling of 87904117481 in words is "eighty-seven billion, nine hundred four million, one hundred seventeen thousand, four hundred eighty-one".