61144977863 has 8 divisors (see below), whose sum is σ = 62383896960. Its totient is φ = 59912811000.

The previous prime is 61144977857. The next prime is 61144977941. The reversal of 61144977863 is 36877944116.

61144977863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61144977863 - 2¹² = 61144973767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61144977799 and 61144977808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61144977263) 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, 1669763 + ... + 1705988.

It is an arithmetic number, because the mean of its divisors is an integer number (7797987120).

Almost surely, 2^61144977863 is an apocalyptic number.

61144977863 is a deficient number, since it is larger than the sum of its proper divisors (1238919097).

61144977863 is a wasteful number, since it uses less digits than its factorization.

61144977863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376117.

The product of its digits is 6096384, while the sum is 56.

The spelling of 61144977863 in words is "sixty-one billion, one hundred forty-four million, nine hundred seventy-seven thousand, eight hundred sixty-three".