61245009132489 has 36 divisors (see below), whose sum is σ = 110824302250116. Its totient is φ = 32305059759168.

The previous prime is 61245009132487. The next prime is 61245009132523. The reversal of 61245009132489 is 98423190054216.

It is a happy number.

61245009132489 is a `hidden beast` number, since 6 + 1 + 2 + 4 + 500 + 91 + 3 + 2 + 48 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7051972358025 + 54193036774464 = 2655555^2 + 7361592^2 .

It is not a de Polignac number, because 61245009132489 - 2¹ = 61245009132487 is a prime.

It is a super-2 number, since 2×61245009132489² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61245009132487) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5341439334 + ... + 5341450799.

It is an arithmetic number, because the mean of its divisors is an integer number (3078452840281).

Almost surely, 2^{61245009132489} is an apocalyptic number.

It is an amenable number.

61245009132489 is a deficient number, since it is larger than the sum of its proper divisors (49579293117627).

61245009132489 is a wasteful number, since it uses less digits than its factorization.

61245009132489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10682890166 (or 10682890156 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 61245009132489 in words is "sixty-one trillion, two hundred forty-five billion, nine million, one hundred thirty-two thousand, four hundred eighty-nine".