81870062075 has 12 divisors (see below), whose sum is σ = 103034086200. Its totient is φ = 64518495360.

The previous prime is 81870062063. The next prime is 81870062077. The reversal of 81870062075 is 57026007818.

It is not a de Polignac number, because 81870062075 - 2¹⁰ = 81870061051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81870062077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24437150 + ... + 24440499.

It is an arithmetic number, because the mean of its divisors is an integer number (8586173850).

Almost surely, 2^81870062075 is an apocalyptic number.

81870062075 is a deficient number, since it is larger than the sum of its proper divisors (21164024125).

81870062075 is a wasteful number, since it uses less digits than its factorization.

81870062075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48877726 (or 48877721 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 81870062075 in words is "eighty-one billion, eight hundred seventy million, sixty-two thousand, seventy-five".