85400077771 has 4 divisors (see below), whose sum is σ = 85400687232. Its totient is φ = 85399468312.

The previous prime is 85400077769. The next prime is 85400077783. The reversal of 85400077771 is 17777000458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 85400077771 - 2¹ = 85400077769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85400077751) 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, 22806 + ... + 413908.

It is an arithmetic number, because the mean of its divisors is an integer number (21350171808).

Almost surely, 2^85400077771 is an apocalyptic number.

85400077771 is a deficient number, since it is larger than the sum of its proper divisors (609461).

85400077771 is a wasteful number, since it uses less digits than its factorization.

85400077771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609460.

The product of its (nonzero) digits is 384160, while the sum is 46.

The spelling of 85400077771 in words is "eighty-five billion, four hundred million, seventy-seven thousand, seven hundred seventy-one".