77450707520 has 56 divisors (see below), whose sum is σ = 190378860288. Its totient is φ = 29980915200.

The previous prime is 77450707517. The next prime is 77450707549. The reversal of 77450707520 is 2570705477.

It is a super-2 number, since 2×77450707520² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3893846 + ... + 3913685.

Almost surely, 2^77450707520 is an apocalyptic number.

It is an amenable number.

77450707520 is an abundant number, since it is smaller than the sum of its proper divisors (112928152768).

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

77450707520 is a wasteful number, since it uses less digits than its factorization.

77450707520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807579 (or 7807569 counting only the distinct ones).

The product of its (nonzero) digits is 480200, while the sum is 44.

The spelling of 77450707520 in words is "seventy-seven billion, four hundred fifty million, seven hundred seven thousand, five hundred twenty".