77199834081 has 4 divisors (see below), whose sum is σ = 102933112112. Its totient is φ = 51466556052.

The previous prime is 77199834001. The next prime is 77199834091. The reversal of 77199834081 is 18043899177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77199834081 - 2¹⁸ = 77199571937 is a prime.

It is a super-2 number, since 2×77199834081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77199834001) 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, 12866639011 + ... + 12866639016.

It is an arithmetic number, because the mean of its divisors is an integer number (25733278028).

Almost surely, 2^77199834081 is an apocalyptic number.

It is an amenable number.

77199834081 is a deficient number, since it is larger than the sum of its proper divisors (25733278031).

77199834081 is a wasteful number, since it uses less digits than its factorization.

77199834081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25733278030.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 77199834081 in words is "seventy-seven billion, one hundred ninety-nine million, eight hundred thirty-four thousand, eighty-one".