61251208244 has 12 divisors (see below), whose sum is σ = 107191434084. Its totient is φ = 30625084224.

The previous prime is 61251208223. The next prime is 61251208279. The reversal of 61251208244 is 44280215216.

It can be written as a sum of positive squares in 2 ways, for example, as 27030648100 + 34220560144 = 164410^2 + 184988^2 .

It is a super-2 number, since 2×61251208244² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276002 + ... + 445734.

It is an arithmetic number, because the mean of its divisors is an integer number (8932619507).

Almost surely, 2^61251208244 is an apocalyptic number.

It is an amenable number.

61251208244 is a deficient number, since it is larger than the sum of its proper divisors (45940225840).

61251208244 is a wasteful number, since it uses less digits than its factorization.

61251208244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259954 (or 259952 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 61251208244 in words is "sixty-one billion, two hundred fifty-one million, two hundred eight thousand, two hundred forty-four".