7742317720 has 16 divisors (see below), whose sum is σ = 17420214960. Its totient is φ = 3096927072.

The previous prime is 7742317703. The next prime is 7742317729. The reversal of 7742317720 is 277132477.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 193557943 = 7742317720 / (7 + 7 + 4 + 2 + 3 + 1 + 7 + 7 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7742317729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96778932 + ... + 96779011.

It is an arithmetic number, because the mean of its divisors is an integer number (1088763435).

Almost surely, 2^7742317720 is an apocalyptic number.

It is an amenable number.

7742317720 is an abundant number, since it is smaller than the sum of its proper divisors (9677897240).

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

7742317720 is a wasteful number, since it uses less digits than its factorization.

7742317720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193557954 (or 193557950 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 40.

The square root of 7742317720 is about 87990.4410717437. The cubic root of 7742317720 is about 1978.2917041146.

The spelling of 7742317720 in words is "seven billion, seven hundred forty-two million, three hundred seventeen thousand, seven hundred twenty".