61520611 has 2 divisors, whose sum is σ = 61520612. Its totient is φ = 61520610.

The previous prime is 61520597. The next prime is 61520663. The reversal of 61520611 is 11602516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61520611 - 2⁵ = 61520579 is a prime.

It is not a weakly prime, because it can be changed into another prime (61520411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30760305 + 30760306.

It is an arithmetic number, because the mean of its divisors is an integer number (30760306).

Almost surely, 2^61520611 is an apocalyptic number.

61520611 is a deficient number, since it is larger than the sum of its proper divisors (1).

61520611 is an equidigital number, since it uses as much as digits as its factorization.

61520611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 61520611 is about 7843.5075699587. The cubic root of 61520611 is about 394.7664292361.

The spelling of 61520611 in words is "sixty-one million, five hundred twenty thousand, six hundred eleven".