61012142430 has 64 divisors (see below), whose sum is σ = 149613972480. Its totient is φ = 15916356224.

The previous prime is 61012142357. The next prime is 61012142459. The reversal of 61012142430 is 3424121016.

It is a self number, because there is not a number n which added to its sum of digits gives 61012142430.

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, 3458392 + ... + 3475988.

It is an arithmetic number, because the mean of its divisors is an integer number (2337718320).

Almost surely, 2^61012142430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61012142430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74806986240).

61012142430 is an abundant number, since it is smaller than the sum of its proper divisors (88601830050).

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

61012142430 is a wasteful number, since it uses less digits than its factorization.

61012142430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20113.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 61012142430 its reverse (3424121016), we get a palindrome (64436263446).

The spelling of 61012142430 in words is "sixty-one billion, twelve million, one hundred forty-two thousand, four hundred thirty".