81887611258 has 8 divisors (see below), whose sum is σ = 124311313728. Its totient is φ = 40450506684.

The previous prime is 81887611241. The next prime is 81887611291. The reversal of 81887611258 is 85211678818.

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

It is a junction number, because it is equal to n+sod(n) for n = 81887611199 and 81887611208.

It is an unprimeable number.

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, 246649266 + ... + 246649597.

It is an arithmetic number, because the mean of its divisors is an integer number (15538914216).

Almost surely, 2^81887611258 is an apocalyptic number.

81887611258 is a deficient number, since it is larger than the sum of its proper divisors (42423702470).

81887611258 is a wasteful number, since it uses less digits than its factorization.

81887611258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493298948.

The product of its digits is 1720320, while the sum is 55.

The spelling of 81887611258 in words is "eighty-one billion, eight hundred eighty-seven million, six hundred eleven thousand, two hundred fifty-eight".