61650637247389 has 2 divisors, whose sum is σ = 61650637247390. Its totient is φ = 61650637247388.

The previous prime is 61650637247383. The next prime is 61650637247489. The reversal of 61650637247389 is 98374273605616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58278841547364 + 3371795700025 = 7634058^2 + 1836245^2 .

It is a cyclic number.

It is not a de Polignac number, because 61650637247389 - 2²³ = 61650628858781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61650637247383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825318623694 + 30825318623695.

It is an arithmetic number, because the mean of its divisors is an integer number (30825318623695).

It is a 1-persistent number, because it is pandigital, but 2⋅61650637247389 = 123301274494778 is not.

Almost surely, 2^{61650637247389} is an apocalyptic number.

It is an amenable number.

61650637247389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61650637247389 is an equidigital number, since it uses as much as digits as its factorization.

61650637247389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274337280, while the sum is 67.

The spelling of 61650637247389 in words is "sixty-one trillion, six hundred fifty billion, six hundred thirty-seven million, two hundred forty-seven thousand, three hundred eighty-nine".