72891081898 has 32 divisors (see below), whose sum is σ = 111856852800. Its totient is φ = 35616139776.

The previous prime is 72891081881. The next prime is 72891081997. The reversal of 72891081898 is 89818019827.

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 15 ways as a sum of consecutive naturals, for example, 11920890 + ... + 11927002.

It is an arithmetic number, because the mean of its divisors is an integer number (3495526650).

Almost surely, 2^72891081898 is an apocalyptic number.

72891081898 is a deficient number, since it is larger than the sum of its proper divisors (38965770902).

72891081898 is a wasteful number, since it uses less digits than its factorization.

72891081898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966.

The product of its (nonzero) digits is 4644864, while the sum is 61.

The spelling of 72891081898 in words is "seventy-two billion, eight hundred ninety-one million, eighty-one thousand, eight hundred ninety-eight".