61422017143540 has 24 divisors (see below), whose sum is σ = 128995029734760. Its totient is φ = 24567131860608.

The previous prime is 61422017143483. The next prime is 61422017143549. The reversal of 61422017143540 is 4534171022416.

It can be written as a sum of positive squares in 4 ways, for example, as 3575222962276 + 57846794181264 = 1890826^2 + 7605708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61422017143493 and 61422017143502.

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 7 ways as a sum of consecutive naturals, for example, 104386587 + ... + 104973346.

It is an arithmetic number, because the mean of its divisors is an integer number (5374792905615).

Almost surely, 2^{61422017143540} is an apocalyptic number.

It is an amenable number.

61422017143540 is an abundant number, since it is smaller than the sum of its proper divisors (67573012591220).

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

61422017143540 is a wasteful number, since it uses less digits than its factorization.

61422017143540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209374611 (or 209374609 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

Adding to 61422017143540 its reverse (4534171022416), we get a palindrome (65956188165956).

The spelling of 61422017143540 in words is "sixty-one trillion, four hundred twenty-two billion, seventeen million, one hundred forty-three thousand, five hundred forty".