61477916945 has 16 divisors (see below), whose sum is σ = 73897449600. Its totient is φ = 49099768704.

The previous prime is 61477916911. The next prime is 61477916971. The reversal of 61477916945 is 54961977416.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61477916945 - 2¹⁰ = 61477915921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13459052 + ... + 13463618.

It is an arithmetic number, because the mean of its divisors is an integer number (4618590600).

Almost surely, 2^61477916945 is an apocalyptic number.

It is an amenable number.

61477916945 is a deficient number, since it is larger than the sum of its proper divisors (12419532655).

61477916945 is a wasteful number, since it uses less digits than its factorization.

61477916945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504.

The product of its digits is 11430720, while the sum is 59.

The spelling of 61477916945 in words is "sixty-one billion, four hundred seventy-seven million, nine hundred sixteen thousand, nine hundred forty-five".