61364220947 has 2 divisors, whose sum is σ = 61364220948. Its totient is φ = 61364220946.

The previous prime is 61364220943. The next prime is 61364221063. The reversal of 61364220947 is 74902246316.

61364220947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61364220947 - 2² = 61364220943 is a prime.

It is a super-2 number, since 2×61364220947² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61364220898 and 61364220907.

It is not a weakly prime, because it can be changed into another prime (61364220943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682110473 + 30682110474.

It is an arithmetic number, because the mean of its divisors is an integer number (30682110474).

Almost surely, 2^61364220947 is an apocalyptic number.

61364220947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61364220947 is an equidigital number, since it uses as much as digits as its factorization.

61364220947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 61364220947 in words is "sixty-one billion, three hundred sixty-four million, two hundred twenty thousand, nine hundred forty-seven".