61677161672 has 32 divisors (see below), whose sum is σ = 132186774720. Its totient is φ = 26428783680.

The previous prime is 61677161659. The next prime is 61677161677. The reversal of 61677161672 is 27616177616.

It is a self number, because there is not a number n which added to its sum of digits gives 61677161672.

It is not an unprimeable number, because it can be changed into a prime (61677161677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272147 + ... + 444317.

It is an arithmetic number, because the mean of its divisors is an integer number (4130836710).

Almost surely, 2^61677161672 is an apocalyptic number.

It is an amenable number.

61677161672 is an abundant number, since it is smaller than the sum of its proper divisors (70509613048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61677161672 is a wasteful number, since it uses less digits than its factorization.

61677161672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178581 (or 178577 counting only the distinct ones).

The product of its digits is 889056, while the sum is 50.

The spelling of 61677161672 in words is "sixty-one billion, six hundred seventy-seven million, one hundred sixty-one thousand, six hundred seventy-two".