61519811 has 2 divisors, whose sum is σ = 61519812. Its totient is φ = 61519810.

The previous prime is 61519771. The next prime is 61519819. The reversal of 61519811 is 11891516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61519811 - 2⁶ = 61519747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61519819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30759905 + 30759906.

It is an arithmetic number, because the mean of its divisors is an integer number (30759906).

Almost surely, 2^61519811 is an apocalyptic number.

61519811 is a deficient number, since it is larger than the sum of its proper divisors (1).

61519811 is an equidigital number, since it uses as much as digits as its factorization.

61519811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 32.

The square root of 61519811 is about 7843.4565722008. The cubic root of 61519811 is about 394.7647180778.

The spelling of 61519811 in words is "sixty-one million, five hundred nineteen thousand, eight hundred eleven".