61247251248 has 20 divisors (see below), whose sum is σ = 158222065848. Its totient is φ = 20415750400.

The previous prime is 61247251243. The next prime is 61247251253. The reversal of 61247251248 is 84215274216.

It is an interprime number because it is at equal distance from previous prime (61247251243) and next prime (61247251253).

It is not an unprimeable number, because it can be changed into a prime (61247251243) 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 3 ways as a sum of consecutive naturals, for example, 637992153 + ... + 637992248.

Almost surely, 2^61247251248 is an apocalyptic number.

It is an amenable number.

61247251248 is an abundant number, since it is smaller than the sum of its proper divisors (96974814600).

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

61247251248 is a wasteful number, since it uses less digits than its factorization.

61247251248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275984412 (or 1275984406 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The spelling of 61247251248 in words is "sixty-one billion, two hundred forty-seven million, two hundred fifty-one thousand, two hundred forty-eight".