61776445149 has 16 divisors (see below), whose sum is σ = 93021000640. Its totient is φ = 40509143280.

The previous prime is 61776445147. The next prime is 61776445153. The reversal of 61776445149 is 94154467716.

It is a happy number.

61776445149 is a `hidden beast` number, since 6 + 17 + 76 + 44 + 514 + 9 = 666.

It is not a de Polignac number, because 61776445149 - 2¹ = 61776445147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61776445095 and 61776445104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61776445147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18752587 + ... + 18755880.

It is an arithmetic number, because the mean of its divisors is an integer number (5813812540).

Almost surely, 2^61776445149 is an apocalyptic number.

It is an amenable number.

61776445149 is a deficient number, since it is larger than the sum of its proper divisors (31244555491).

61776445149 is a wasteful number, since it uses less digits than its factorization.

61776445149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37508537 (or 37508531 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 61776445149 in words is "sixty-one billion, seven hundred seventy-six million, four hundred forty-five thousand, one hundred forty-nine".