87442315919 has 8 divisors (see below), whose sum is σ = 99949433760. Its totient is φ = 74939037696.

The previous prime is 87442315903. The next prime is 87442315921. The reversal of 87442315919 is 91951324478.

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 87442315919 - 2⁴ = 87442315903 is a prime.

It is a super-2 number, since 2×87442315919² (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 (87442315619) 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, 910934 + ... + 1002339.

It is an arithmetic number, because the mean of its divisors is an integer number (12493679220).

Almost surely, 2^87442315919 is an apocalyptic number.

87442315919 is a deficient number, since it is larger than the sum of its proper divisors (12507117841).

87442315919 is a wasteful number, since it uses less digits than its factorization.

87442315919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919809.

The product of its digits is 2177280, while the sum is 53.

The spelling of 87442315919 in words is "eighty-seven billion, four hundred forty-two million, three hundred fifteen thousand, nine hundred nineteen".