81870958603 has 16 divisors (see below), whose sum is σ = 95414837760. Its totient is φ = 68800132800.

The previous prime is 81870958601. The next prime is 81870958619. The reversal of 81870958603 is 30685907818.

It is not a de Polignac number, because 81870958603 - 2¹ = 81870958601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81870958601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371178 + ... + 549103.

It is an arithmetic number, because the mean of its divisors is an integer number (5963427360).

Almost surely, 2^81870958603 is an apocalyptic number.

81870958603 is a deficient number, since it is larger than the sum of its proper divisors (13543879157).

81870958603 is a wasteful number, since it uses less digits than its factorization.

81870958603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920538.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 81870958603 in words is "eighty-one billion, eight hundred seventy million, nine hundred fifty-eight thousand, six hundred three".