7081691898 has 32 divisors (see below), whose sum is σ = 14416487424. Its totient is φ = 2318584752.

The previous prime is 7081691783. The next prime is 7081691899. The reversal of 7081691898 is 8981961807.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7081691899) 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, 114111 + ... + 164877.

It is an arithmetic number, because the mean of its divisors is an integer number (450515232).

Almost surely, 2^7081691898 is an apocalyptic number.

7081691898 is an abundant number, since it is smaller than the sum of its proper divisors (7334795526).

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

7081691898 is a wasteful number, since it uses less digits than its factorization.

7081691898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51186.

The product of its (nonzero) digits is 1741824, while the sum is 57.

The square root of 7081691898 is about 84152.7890090400. The cubic root of 7081691898 is about 1920.3438961910.

The spelling of 7081691898 in words is "seven billion, eighty-one million, six hundred ninety-one thousand, eight hundred ninety-eight".