80898804251 has 4 divisors (see below), whose sum is σ = 80919493104. Its totient is φ = 80878115400.

The previous prime is 80898804241. The next prime is 80898804269. The reversal of 80898804251 is 15240889808.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80898804251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80898804193 and 80898804202.

It is not an unprimeable number, because it can be changed into a prime (80898804241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10338560 + ... + 10346381.

It is an arithmetic number, because the mean of its divisors is an integer number (20229873276).

Almost surely, 2^80898804251 is an apocalyptic number.

80898804251 is a deficient number, since it is larger than the sum of its proper divisors (20688853).

80898804251 is a wasteful number, since it uses less digits than its factorization.

80898804251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20688852.

The product of its (nonzero) digits is 1474560, while the sum is 53.

The spelling of 80898804251 in words is "eighty billion, eight hundred ninety-eight million, eight hundred four thousand, two hundred fifty-one".