81488862057 has 8 divisors (see below), whose sum is σ = 110027155840. Its totient is φ = 53638238160.

The previous prime is 81488862043. The next prime is 81488862067. The reversal of 81488862057 is 75026888418.

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

It is not a de Polignac number, because 81488862057 - 2³¹ = 79341378409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81488861988 and 81488862006.

It is not an unprimeable number, because it can be changed into a prime (81488862067) 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, 171917194 + ... + 171917667.

It is an arithmetic number, because the mean of its divisors is an integer number (13753394480).

Almost surely, 2^81488862057 is an apocalyptic number.

It is an amenable number.

81488862057 is a deficient number, since it is larger than the sum of its proper divisors (28538293783).

81488862057 is a wasteful number, since it uses less digits than its factorization.

81488862057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343834943.

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 81488862057 in words is "eighty-one billion, four hundred eighty-eight million, eight hundred sixty-two thousand, fifty-seven".