61217011250 has 40 divisors (see below), whose sum is σ = 115328092572. Its totient is φ = 24362408000.

The previous prime is 61217011249. The next prime is 61217011279. The reversal of 61217011250 is 5211071216.

It can be written as a sum of positive squares in 10 ways, for example, as 6680283289 + 54536727961 = 81733^2 + 233531^2 .

It is a super-3 number, since 3×61217011250³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121952 + ... + 370548.

Almost surely, 2^61217011250 is an apocalyptic number.

61217011250 is a deficient number, since it is larger than the sum of its proper divisors (54111081322).

61217011250 is a wasteful number, since it uses less digits than its factorization.

61217011250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248816 (or 248801 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 61217011250 its reverse (5211071216), we get a palindrome (66428082466).

The spelling of 61217011250 in words is "sixty-one billion, two hundred seventeen million, eleven thousand, two hundred fifty".