80428868642 has 8 divisors (see below), whose sum is σ = 120761467932. Its totient is φ = 40175046000.

The previous prime is 80428868633. The next prime is 80428868651. The reversal of 80428868642 is 24686882408.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80428868633) and next prime (80428868651).

It can be written as a sum of positive squares in 2 ways, for example, as 80140514281 + 288354361 = 283091^2 + 16981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×80428868642² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19691609 + ... + 19695692.

Almost surely, 2^80428868642 is an apocalyptic number.

80428868642 is a deficient number, since it is larger than the sum of its proper divisors (40332599290).

80428868642 is a wasteful number, since it uses less digits than its factorization.

80428868642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39388324.

The product of its (nonzero) digits is 9437184, while the sum is 56.

The spelling of 80428868642 in words is "eighty billion, four hundred twenty-eight million, eight hundred sixty-eight thousand, six hundred forty-two".