61245519489 has 144 divisors (see below), whose sum is σ = 122707892736. Its totient is φ = 28977177600.

The previous prime is 61245519463. The next prime is 61245519499. The reversal of 61245519489 is 98491554216.

61245519489 is a `hidden beast` number, since 6 + 1 + 2 + 4 + 551 + 9 + 4 + 89 = 666.

It is not a de Polignac number, because 61245519489 - 2⁵ = 61245519457 is a prime.

It is a super-2 number, since 2×61245519489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61245519499) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2544499 + ... + 2568455.

It is an arithmetic number, because the mean of its divisors is an integer number (852138144).

Almost surely, 2^61245519489 is an apocalyptic number.

It is an amenable number.

61245519489 is an abundant number, since it is smaller than the sum of its proper divisors (61462373247).

61245519489 is a wasteful number, since it uses less digits than its factorization.

61245519489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24036 (or 24026 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 61245519489 in words is "sixty-one billion, two hundred forty-five million, five hundred nineteen thousand, four hundred eighty-nine".