61549870248 has 32 divisors (see below), whose sum is σ = 170971862400. Its totient is φ = 20516623344.

The previous prime is 61549870243. The next prime is 61549870273. The reversal of 61549870248 is 84207894516.

It is a happy number.

61549870248 is a `hidden beast` number, since 6 + 1 + 549 + 8 + 70 + 24 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 61549870194 and 61549870203.

It is not an unprimeable number, because it can be changed into a prime (61549870243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142476336 + ... + 142476767.

It is an arithmetic number, because the mean of its divisors is an integer number (5342870700).

Almost surely, 2^61549870248 is an apocalyptic number.

It is an amenable number.

61549870248 is an abundant number, since it is smaller than the sum of its proper divisors (109421992152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61549870248 is a wasteful number, since it uses less digits than its factorization.

61549870248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284953118 (or 284953108 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 61549870248 in words is "sixty-one billion, five hundred forty-nine million, eight hundred seventy thousand, two hundred forty-eight".