7720191396 has 36 divisors (see below), whose sum is σ = 19693974300. Its totient is φ = 2549786688.

The previous prime is 7720191383. The next prime is 7720191407. The reversal of 7720191396 is 6931910277.

7720191396 is a `hidden beast` number, since 7 + 72 + 0 + 191 + 396 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5407543296 + 2312648100 = 73536^2 + 48090^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 979791 + ... + 987638.

Almost surely, 2^7720191396 is an apocalyptic number.

It is an amenable number.

7720191396 is an abundant number, since it is smaller than the sum of its proper divisors (11973782904).

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

7720191396 is a wasteful number, since it uses less digits than its factorization.

7720191396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967548 (or 1967543 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 7720191396 is about 87864.6197055447. The cubic root of 7720191396 is about 1976.4053573616.

The spelling of 7720191396 in words is "seven billion, seven hundred twenty million, one hundred ninety-one thousand, three hundred ninety-six".