77733770744 has 16 divisors (see below), whose sum is σ = 166572366000. Its totient is φ = 33314473152.

The previous prime is 77733770743. The next prime is 77733770797. The reversal of 77733770744 is 44707733777.

It is a super-2 number, since 2×77733770744² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 1388103049 = 77733770744 / (7 + 7 + 7 + 3 + 3 + 7 + 7 + 0 + 7 + 4 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 77733770744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77733770743) 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, 694051469 + ... + 694051580.

It is an arithmetic number, because the mean of its divisors is an integer number (10410772875).

Almost surely, 2^77733770744 is an apocalyptic number.

It is an amenable number.

77733770744 is an abundant number, since it is smaller than the sum of its proper divisors (88838595256).

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

77733770744 is a wasteful number, since it uses less digits than its factorization.

77733770744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388103062 (or 1388103058 counting only the distinct ones).

The product of its (nonzero) digits is 16941456, while the sum is 56.

The spelling of 77733770744 in words is "seventy-seven billion, seven hundred thirty-three million, seven hundred seventy thousand, seven hundred forty-four".