61371928811 has 2 divisors, whose sum is σ = 61371928812. Its totient is φ = 61371928810.

The previous prime is 61371928799. The next prime is 61371928819. The reversal of 61371928811 is 11882917316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61371928811 - 2²² = 61367734507 is a prime.

It is not a weakly prime, because it can be changed into another prime (61371928819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30685964405 + 30685964406.

It is an arithmetic number, because the mean of its divisors is an integer number (30685964406).

Almost surely, 2^61371928811 is an apocalyptic number.

61371928811 is a deficient number, since it is larger than the sum of its proper divisors (1).

61371928811 is an equidigital number, since it uses as much as digits as its factorization.

61371928811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The spelling of 61371928811 in words is "sixty-one billion, three hundred seventy-one million, nine hundred twenty-eight thousand, eight hundred eleven".