77772446248 has 32 divisors (see below), whose sum is σ = 168938199360. Its totient is φ = 32874456960.

The previous prime is 77772446203. The next prime is 77772446249. The reversal of 77772446248 is 84264427777.

It is a junction number, because it is equal to n+sod(n) for n = 77772446192 and 77772446201.

It is not an unprimeable number, because it can be changed into a prime (77772446249) 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, 9508198 + ... + 9516373.

It is an arithmetic number, because the mean of its divisors is an integer number (5279318730).

Almost surely, 2^77772446248 is an apocalyptic number.

It is an amenable number.

77772446248 is an abundant number, since it is smaller than the sum of its proper divisors (91165753112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77772446248 is a wasteful number, since it uses less digits than its factorization.

77772446248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19024657 (or 19024653 counting only the distinct ones).

The product of its digits is 29503488, while the sum is 58.

The spelling of 77772446248 in words is "seventy-seven billion, seven hundred seventy-two million, four hundred forty-six thousand, two hundred forty-eight".