61969694867 has 2 divisors, whose sum is σ = 61969694868. Its totient is φ = 61969694866.

The previous prime is 61969694837. The next prime is 61969694879. The reversal of 61969694867 is 76849696916.

61969694867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61969694867 - 2³⁰ = 60895953043 is a prime.

It is a super-2 number, since 2×61969694867² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61969694867.

It is not a weakly prime, because it can be changed into another prime (61969694837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984847433 + 30984847434.

It is an arithmetic number, because the mean of its divisors is an integer number (30984847434).

Almost surely, 2^61969694867 is an apocalyptic number.

61969694867 is a deficient number, since it is larger than the sum of its proper divisors (1).

61969694867 is an equidigital number, since it uses as much as digits as its factorization.

61969694867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211631616, while the sum is 71.

The spelling of 61969694867 in words is "sixty-one billion, nine hundred sixty-nine million, six hundred ninety-four thousand, eight hundred sixty-seven".