61996511 has 2 divisors, whose sum is σ = 61996512. Its totient is φ = 61996510.

The previous prime is 61996489. The next prime is 61996513. The reversal of 61996511 is 11569916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61996511 is a prime.

Together with 61996513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61996513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30998255 + 30998256.

It is an arithmetic number, because the mean of its divisors is an integer number (30998256).

Almost surely, 2^61996511 is an apocalyptic number.

61996511 is a deficient number, since it is larger than the sum of its proper divisors (1).

61996511 is an equidigital number, since it uses as much as digits as its factorization.

61996511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 38.

The square root of 61996511 is about 7873.7863191733. The cubic root of 61996511 is about 395.7817365902.

The spelling of 61996511 in words is "sixty-one million, nine hundred ninety-six thousand, five hundred eleven".