80029777766401 has 8 divisors (see below), whose sum is σ = 81754643588904. Its totient is φ = 78318231371520.

The previous prime is 80029777766399. The next prime is 80029777766417. The reversal of 80029777766401 is 10466777792008.

It can be written as a sum of positive squares in 4 ways, for example, as 1961526297025 + 78068251469376 = 1400545^2 + 8835624^2 .

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

It is not a de Polignac number, because 80029777766401 - 2¹ = 80029777766399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80029777766801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3329844760 + ... + 3329868793.

It is an arithmetic number, because the mean of its divisors is an integer number (10219330448613).

Almost surely, 2^{80029777766401} is an apocalyptic number.

It is an amenable number.

80029777766401 is a deficient number, since it is larger than the sum of its proper divisors (1724865822503).

80029777766401 is a wasteful number, since it uses less digits than its factorization.

80029777766401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659713811.

The product of its (nonzero) digits is 49787136, while the sum is 64.

The spelling of 80029777766401 in words is "eighty trillion, twenty-nine billion, seven hundred seventy-seven million, seven hundred sixty-six thousand, four hundred one".