61516619 has 2 divisors, whose sum is σ = 61516620. Its totient is φ = 61516618.

The previous prime is 61516603. The next prime is 61516633. The reversal of 61516619 is 91661516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61516619 - 2⁴ = 61516603 is a prime.

It is a super-2 number, since 2×61516619² = 7568588826382322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61516649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30758309 + 30758310.

It is an arithmetic number, because the mean of its divisors is an integer number (30758310).

Almost surely, 2^61516619 is an apocalyptic number.

61516619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61516619 is an equidigital number, since it uses as much as digits as its factorization.

61516619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 61516619 is about 7843.2530878456. The cubic root of 61516619 is about 394.7578904086.

The spelling of 61516619 in words is "sixty-one million, five hundred sixteen thousand, six hundred nineteen".