61620421056323 has 2 divisors, whose sum is σ = 61620421056324. Its totient is φ = 61620421056322.

The previous prime is 61620421056277. The next prime is 61620421056361. The reversal of 61620421056323 is 32365012402616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61620421056323 - 2¹⁶ = 61620420990787 is a prime.

It is not a weakly prime, because it can be changed into another prime (61620421076323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810210528161 + 30810210528162.

It is an arithmetic number, because the mean of its divisors is an integer number (30810210528162).

Almost surely, 2^{61620421056323} is an apocalyptic number.

61620421056323 is a deficient number, since it is larger than the sum of its proper divisors (1).

61620421056323 is an equidigital number, since it uses as much as digits as its factorization.

61620421056323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 61620421056323 its reverse (32365012402616), we get a palindrome (93985433458939).

The spelling of 61620421056323 in words is "sixty-one trillion, six hundred twenty billion, four hundred twenty-one million, fifty-six thousand, three hundred twenty-three".