61648761892 has 12 divisors (see below), whose sum is σ = 107887071600. Its totient is φ = 30823884296.

The previous prime is 61648761857. The next prime is 61648761893. The reversal of 61648761892 is 29816784616.

It is a super-2 number, since 2×61648761892² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61648761893) 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 in 3 ways as a sum of consecutive naturals, for example, 425283 + ... + 551509.

It is an arithmetic number, because the mean of its divisors is an integer number (8990589300).

Almost surely, 2^61648761892 is an apocalyptic number.

It is an amenable number.

61648761892 is a deficient number, since it is larger than the sum of its proper divisors (46238309708).

61648761892 is a wasteful number, since it uses less digits than its factorization.

61648761892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248330 (or 248328 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 61648761892 in words is "sixty-one billion, six hundred forty-eight million, seven hundred sixty-one thousand, eight hundred ninety-two".