77772242773 has 8 divisors (see below), whose sum is σ = 78130507392. Its totient is φ = 77414115936.

The previous prime is 77772242761. The next prime is 77772242777. The reversal of 77772242773 is 37724227777.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77772242773 - 2⁵ = 77772242741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77772242777) 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, 1198036 + ... + 1261282.

It is an arithmetic number, because the mean of its divisors is an integer number (9766313424).

Almost surely, 2^77772242773 is an apocalyptic number.

It is an amenable number.

77772242773 is a deficient number, since it is larger than the sum of its proper divisors (358264619).

77772242773 is a wasteful number, since it uses less digits than its factorization.

77772242773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68891.

The product of its digits is 11294304, while the sum is 55.

The spelling of 77772242773 in words is "seventy-seven billion, seven hundred seventy-two million, two hundred forty-two thousand, seven hundred seventy-three".