80818762078 has 4 divisors (see below), whose sum is σ = 121228143120. Its totient is φ = 40409381038.

The previous prime is 80818762001. The next prime is 80818762099. The reversal of 80818762078 is 87026781808.

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

It is a super-3 number, since 3×80818762078³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20204690518 + ... + 20204690521.

It is an arithmetic number, because the mean of its divisors is an integer number (30307035780).

Almost surely, 2^80818762078 is an apocalyptic number.

80818762078 is a deficient number, since it is larger than the sum of its proper divisors (40409381042).

80818762078 is a wasteful number, since it uses less digits than its factorization.

80818762078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40409381041.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 80818762078 in words is "eighty billion, eight hundred eighteen million, seven hundred sixty-two thousand, seventy-eight".