61510643 has 2 divisors, whose sum is σ = 61510644. Its totient is φ = 61510642.

The previous prime is 61510621. The next prime is 61510651. The reversal of 61510643 is 34601516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61510643 - 2¹² = 61506547 is a prime.

It is not a weakly prime, because it can be changed into another prime (61510693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30755321 + 30755322.

It is an arithmetic number, because the mean of its divisors is an integer number (30755322).

Almost surely, 2^61510643 is an apocalyptic number.

61510643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61510643 is an equidigital number, since it uses as much as digits as its factorization.

61510643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61510643 is about 7842.8721142194. The cubic root of 61510643 is about 394.7451071445.

The spelling of 61510643 in words is "sixty-one million, five hundred ten thousand, six hundred forty-three".