61243644141 has 6 divisors (see below), whose sum is σ = 88463041550. Its totient is φ = 40829096088.

The previous prime is 61243644139. The next prime is 61243644191. The reversal of 61243644141 is 14144634216.

61243644141 is a `hidden beast` number, since 6 + 1 + 2 + 4 + 3 + 644 + 1 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46468269225 + 14775374916 = 215565^2 + 121554^2 .

It is not a de Polignac number, because 61243644141 - 2¹ = 61243644139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61243644096 and 61243644105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61243644191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3402424666 + ... + 3402424683.

Almost surely, 2^61243644141 is an apocalyptic number.

It is an amenable number.

61243644141 is a deficient number, since it is larger than the sum of its proper divisors (27219397409).

61243644141 is a wasteful number, since it uses less digits than its factorization.

61243644141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804849355 (or 6804849352 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The spelling of 61243644141 in words is "sixty-one billion, two hundred forty-three million, six hundred forty-four thousand, one hundred forty-one".