61977149762 has 32 divisors (see below), whose sum is σ = 103027360320. Its totient is φ = 27724942080.

The previous prime is 61977149761. The next prime is 61977149777. The reversal of 61977149762 is 26794177916.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61977149761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597814 + ... + 1636142.

It is an arithmetic number, because the mean of its divisors is an integer number (3219605010).

Almost surely, 2^61977149762 is an apocalyptic number.

61977149762 is a deficient number, since it is larger than the sum of its proper divisors (41050210558).

61977149762 is a wasteful number, since it uses less digits than its factorization.

61977149762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39506.

The product of its digits is 8001504, while the sum is 59.

The spelling of 61977149762 in words is "sixty-one billion, nine hundred seventy-seven million, one hundred forty-nine thousand, seven hundred sixty-two".