61216833549 has 8 divisors (see below), whose sum is σ = 81625593280. Its totient is φ = 40809648096.

The previous prime is 61216833547. The next prime is 61216833551. The reversal of 61216833549 is 94533861216.

It is an interprime number because it is at equal distance from previous prime (61216833547) and next prime (61216833551).

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

It is not a de Polignac number, because 61216833549 - 2¹ = 61216833547 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61216833498 and 61216833507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216833547) 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, 299632 + ... + 460665.

It is an arithmetic number, because the mean of its divisors is an integer number (10203199160).

Almost surely, 2^61216833549 is an apocalyptic number.

It is an amenable number.

61216833549 is a deficient number, since it is larger than the sum of its proper divisors (20408759731).

61216833549 is a wasteful number, since it uses less digits than its factorization.

61216833549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787139.

The product of its digits is 933120, while the sum is 48.

The spelling of 61216833549 in words is "sixty-one billion, two hundred sixteen million, eight hundred thirty-three thousand, five hundred forty-nine".