61306125140 has 96 divisors (see below), whose sum is σ = 144150881280. Its totient is φ = 21747916800.

The previous prime is 61306125119. The next prime is 61306125151. The reversal of 61306125140 is 4152160316.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1092980 + ... + 1147700.

It is an arithmetic number, because the mean of its divisors is an integer number (1501571680).

Almost surely, 2^61306125140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61306125140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72075440640).

61306125140 is an abundant number, since it is smaller than the sum of its proper divisors (82844756140).

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

61306125140 is a wasteful number, since it uses less digits than its factorization.

61306125140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54913 (or 54911 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 61306125140 its reverse (4152160316), we get a palindrome (65458285456).

The spelling of 61306125140 in words is "sixty-one billion, three hundred six million, one hundred twenty-five thousand, one hundred forty".