61422017143542 has 64 divisors (see below), whose sum is σ = 136893974012928. Its totient is φ = 18212592320000.

The previous prime is 61422017143483. The next prime is 61422017143549. The reversal of 61422017143542 is 24534171022416.

It is a junction number, because it is equal to n+sod(n) for n = 61422017143494 and 61422017143503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61422017143549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11474542 + ... + 15953342.

It is an arithmetic number, because the mean of its divisors is an integer number (2138968343952).

Almost surely, 2^{61422017143542} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61422017143542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68446987006464).

61422017143542 is an abundant number, since it is smaller than the sum of its proper divisors (75471956869386).

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

61422017143542 is a wasteful number, since it uses less digits than its factorization.

61422017143542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483285.

The product of its (nonzero) digits is 322560, while the sum is 42.

Adding to 61422017143542 its reverse (24534171022416), we get a palindrome (85956188165958).

The spelling of 61422017143542 in words is "sixty-one trillion, four hundred twenty-two billion, seventeen million, one hundred forty-three thousand, five hundred forty-two".