61725549249 has 24 divisors (see below), whose sum is σ = 109734311232. Its totient is φ = 32558531040.

The previous prime is 61725549229. The next prime is 61725549253. The reversal of 61725549249 is 94294552716.

It is a happy number.

61725549249 is a `hidden beast` number, since 6 + 1 + 72 + 5 + 549 + 24 + 9 = 666.

It is not a de Polignac number, because 61725549249 - 2⁸ = 61725548993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61725549195 and 61725549204.

It is not an unprimeable number, because it can be changed into a prime (61725549209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37682667 + ... + 37684304.

It is an arithmetic number, because the mean of its divisors is an integer number (4572262968).

Almost surely, 2^61725549249 is an apocalyptic number.

It is an amenable number.

61725549249 is a deficient number, since it is larger than the sum of its proper divisors (48008761983).

61725549249 is a wasteful number, since it uses less digits than its factorization.

61725549249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75366997 (or 75366994 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 61725549249 in words is "sixty-one billion, seven hundred twenty-five million, five hundred forty-nine thousand, two hundred forty-nine".