81935400930 has 32 divisors (see below), whose sum is σ = 197743550400. Its totient is φ = 21727374912.

The previous prime is 81935400889. The next prime is 81935400971. The reversal of 81935400930 is 3900453918.

It is an interprime number because it is at equal distance from previous prime (81935400889) and next prime (81935400971).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7623625 + ... + 7634364.

It is an arithmetic number, because the mean of its divisors is an integer number (6179485950).

Almost surely, 2^81935400930 is an apocalyptic number.

81935400930 is an abundant number, since it is smaller than the sum of its proper divisors (115808149470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81935400930 is a wasteful number, since it uses less digits than its factorization.

81935400930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15258178.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 81935400930 in words is "eighty-one billion, nine hundred thirty-five million, four hundred thousand, nine hundred thirty".