77009247044 has 6 divisors (see below), whose sum is σ = 134766182334. Its totient is φ = 38504623520.

The previous prime is 77009247043. The next prime is 77009247109. The reversal of 77009247044 is 44074290077.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58207352644 + 18801894400 = 241262^2 + 137120^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77009246986 and 77009247004.

It is not an unprimeable number, because it can be changed into a prime (77009247043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9626155877 + ... + 9626155884.

It is an arithmetic number, because the mean of its divisors is an integer number (22461030389).

Almost surely, 2^77009247044 is an apocalyptic number.

It is an amenable number.

77009247044 is a deficient number, since it is larger than the sum of its proper divisors (57756935290).

77009247044 is a wasteful number, since it uses less digits than its factorization.

77009247044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19252311765 (or 19252311763 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 77009247044 in words is "seventy-seven billion, nine million, two hundred forty-seven thousand, forty-four".