61026047989 has 2 divisors, whose sum is σ = 61026047990. Its totient is φ = 61026047988.

The previous prime is 61026047987. The next prime is 61026048071. The reversal of 61026047989 is 98974062016.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60708032100 + 318015889 = 246390^2 + 17833^2 .

It is a cyclic number.

It is not a de Polignac number, because 61026047989 - 2¹ = 61026047987 is a prime.

Together with 61026047987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61026047987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30513023994 + 30513023995.

It is an arithmetic number, because the mean of its divisors is an integer number (30513023995).

Almost surely, 2^61026047989 is an apocalyptic number.

It is an amenable number.

61026047989 is a deficient number, since it is larger than the sum of its proper divisors (1).

61026047989 is an equidigital number, since it uses as much as digits as its factorization.

61026047989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 61026047989 in words is "sixty-one billion, twenty-six million, forty-seven thousand, nine hundred eighty-nine".