77467965961 has 2 divisors, whose sum is σ = 77467965962. Its totient is φ = 77467965960.

The previous prime is 77467965893. The next prime is 77467965979. The reversal of 77467965961 is 16956976477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60999120400 + 16468845561 = 246980^2 + 128331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77467965961 is a prime.

It is a super-3 number, since 3×77467965961³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77467965461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38733982980 + 38733982981.

It is an arithmetic number, because the mean of its divisors is an integer number (38733982981).

Almost surely, 2^77467965961 is an apocalyptic number.

It is an amenable number.

77467965961 is a deficient number, since it is larger than the sum of its proper divisors (1).

77467965961 is an equidigital number, since it uses as much as digits as its factorization.

77467965961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120022560, while the sum is 67.

The spelling of 77467965961 in words is "seventy-seven billion, four hundred sixty-seven million, nine hundred sixty-five thousand, nine hundred sixty-one".