77209193513 has 2 divisors, whose sum is σ = 77209193514. Its totient is φ = 77209193512.

The previous prime is 77209193473. The next prime is 77209193549. The reversal of 77209193513 is 31539190277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50662356889 + 26546836624 = 225083^2 + 162932^2 .

It is a cyclic number.

It is not a de Polignac number, because 77209193513 - 2²⁴ = 77192416297 is a prime.

It is a super-2 number, since 2×77209193513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77209193813) 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 as a sum of consecutive naturals, namely, 38604596756 + 38604596757.

It is an arithmetic number, because the mean of its divisors is an integer number (38604596757).

Almost surely, 2^77209193513 is an apocalyptic number.

It is an amenable number.

77209193513 is a deficient number, since it is larger than the sum of its proper divisors (1).

77209193513 is an equidigital number, since it uses as much as digits as its factorization.

77209193513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 357210, while the sum is 47.

The spelling of 77209193513 in words is "seventy-seven billion, two hundred nine million, one hundred ninety-three thousand, five hundred thirteen".