61620133147 has 2 divisors, whose sum is σ = 61620133148. Its totient is φ = 61620133146.

The previous prime is 61620133139. The next prime is 61620133151. The reversal of 61620133147 is 74133102616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61620133147 - 2³ = 61620133139 is a prime.

It is not a weakly prime, because it can be changed into another prime (61620133187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810066573 + 30810066574.

It is an arithmetic number, because the mean of its divisors is an integer number (30810066574).

Almost surely, 2^61620133147 is an apocalyptic number.

61620133147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61620133147 is an equidigital number, since it uses as much as digits as its factorization.

61620133147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 61620133147 in words is "sixty-one billion, six hundred twenty million, one hundred thirty-three thousand, one hundred forty-seven".