61459171772 has 6 divisors (see below), whose sum is σ = 107553550608. Its totient is φ = 30729585884.

The previous prime is 61459171771. The next prime is 61459171811. The reversal of 61459171772 is 27717195416.

It is a self number, because there is not a number n which added to its sum of digits gives 61459171772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61459171771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7682396468 + ... + 7682396475.

It is an arithmetic number, because the mean of its divisors is an integer number (17925591768).

Almost surely, 2^61459171772 is an apocalyptic number.

It is an amenable number.

61459171772 is a deficient number, since it is larger than the sum of its proper divisors (46094378836).

61459171772 is a wasteful number, since it uses less digits than its factorization.

61459171772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15364792947 (or 15364792945 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The spelling of 61459171772 in words is "sixty-one billion, four hundred fifty-nine million, one hundred seventy-one thousand, seven hundred seventy-two".