61715611 has 2 divisors, whose sum is σ = 61715612. Its totient is φ = 61715610.

The previous prime is 61715603. The next prime is 61715617. The reversal of 61715611 is 11651716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61715611 - 2³ = 61715603 is a prime.

It is a super-2 number, since 2×61715611² = 7617633282206642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61715611.

It is not a weakly prime, because it can be changed into another prime (61715617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30857805 + 30857806.

It is an arithmetic number, because the mean of its divisors is an integer number (30857806).

Almost surely, 2^61715611 is an apocalyptic number.

61715611 is a deficient number, since it is larger than the sum of its proper divisors (1).

61715611 is an equidigital number, since it uses as much as digits as its factorization.

61715611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 28.

The square root of 61715611 is about 7855.9283983499. The cubic root of 61715611 is about 395.1830823558.

It can be divided in two parts, 61715 and 611, that added together give a palindrome (62326).

The spelling of 61715611 in words is "sixty-one million, seven hundred fifteen thousand, six hundred eleven".