61142113613421 has 16 divisors (see below), whose sum is σ = 90581262448320. Its totient is φ = 40761250049520.

The previous prime is 61142113613417. The next prime is 61142113613461. The reversal of 61142113613421 is 12431631124116.

61142113613421 is a `hidden beast` number, since 6 + 1 + 1 + 4 + 2 + 1 + 13 + 613 + 4 + 21 = 666.

It is not a de Polignac number, because 61142113613421 - 2² = 61142113613417 is a prime.

It is a super-3 number, since 3×61142113613421³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61142113613461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2848686 + ... + 11419248.

It is an arithmetic number, because the mean of its divisors is an integer number (5661328903020).

Almost surely, 2^{61142113613421} is an apocalyptic number.

It is an amenable number.

61142113613421 is a deficient number, since it is larger than the sum of its proper divisors (29439148834899).

61142113613421 is a wasteful number, since it uses less digits than its factorization.

61142113613421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834793 (or 8834787 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

Adding to 61142113613421 its reverse (12431631124116), we get a palindrome (73573744737537).

The spelling of 61142113613421 in words is "sixty-one trillion, one hundred forty-two billion, one hundred thirteen million, six hundred thirteen thousand, four hundred twenty-one".