61648759 has 2 divisors, whose sum is σ = 61648760. Its totient is φ = 61648758.

The previous prime is 61648733. The next prime is 61648813. The reversal of 61648759 is 95784616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61648759 - 2¹⁹ = 61124471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61648709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30824379 + 30824380.

It is an arithmetic number, because the mean of its divisors is an integer number (30824380).

Almost surely, 2^61648759 is an apocalyptic number.

61648759 is a deficient number, since it is larger than the sum of its proper divisors (1).

61648759 is an equidigital number, since it uses as much as digits as its factorization.

61648759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 61648759 is about 7851.6723696293. The cubic root of 61648759 is about 395.0403398421.

The spelling of 61648759 in words is "sixty-one million, six hundred forty-eight thousand, seven hundred fifty-nine".