61967822861 has 4 divisors (see below), whose sum is σ = 70820368992. Its totient is φ = 53115276732.

The previous prime is 61967822843. The next prime is 61967822879. The reversal of 61967822861 is 16822876916.

It is a happy number.

61967822861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (61967822843) and next prime (61967822879).

It is not a de Polignac number, because 61967822861 - 2⁶ = 61967822797 is a prime.

It is a super-2 number, since 2×61967822861² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61967822797 and 61967822806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61967822801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4426273055 + ... + 4426273068.

It is an arithmetic number, because the mean of its divisors is an integer number (17705092248).

Almost surely, 2^61967822861 is an apocalyptic number.

It is an amenable number.

61967822861 is a deficient number, since it is larger than the sum of its proper divisors (8852546131).

61967822861 is an equidigital number, since it uses as much as digits as its factorization.

61967822861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8852546130.

The product of its digits is 3483648, while the sum is 56.

The spelling of 61967822861 in words is "sixty-one billion, nine hundred sixty-seven million, eight hundred twenty-two thousand, eight hundred sixty-one".