61849442057 has 8 divisors (see below), whose sum is σ = 68231655240. Its totient is φ = 55699309440.

The previous prime is 61849442027. The next prime is 61849442059. The reversal of 61849442057 is 75024494816.

It can be written as a sum of positive squares in 4 ways, for example, as 414366736 + 61435075321 = 20356^2 + 247861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61849442057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61849441996 and 61849442014.

It is not an unprimeable number, because it can be changed into a prime (61849442059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58019582 + ... + 58020647.

It is an arithmetic number, because the mean of its divisors is an integer number (8528956905).

Almost surely, 2^61849442057 is an apocalyptic number.

It is an amenable number.

61849442057 is a deficient number, since it is larger than the sum of its proper divisors (6382213183).

61849442057 is a wasteful number, since it uses less digits than its factorization.

61849442057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116040283.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 61849442057 in words is "sixty-one billion, eight hundred forty-nine million, four hundred forty-two thousand, fifty-seven".