78769840144 has 10 divisors (see below), whose sum is σ = 152616565310. Its totient is φ = 39384920064.

The previous prime is 78769840141. The next prime is 78769840151. The reversal of 78769840144 is 44104896787.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52973625600 + 25796214544 = 230160^2 + 160612^2 .

It is a super-2 number, since 2×78769840144² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78769840141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2461557489 + ... + 2461557520.

It is an arithmetic number, because the mean of its divisors is an integer number (15261656531).

Almost surely, 2^78769840144 is an apocalyptic number.

It is an amenable number.

78769840144 is a deficient number, since it is larger than the sum of its proper divisors (73846725166).

78769840144 is a wasteful number, since it uses less digits than its factorization.

78769840144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923115017 (or 4923115011 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 78769840144 in words is "seventy-eight billion, seven hundred sixty-nine million, eight hundred forty thousand, one hundred forty-four".