77542641268 has 12 divisors (see below), whose sum is σ = 135828744352. Its totient is φ = 38734428600.

The previous prime is 77542641247. The next prime is 77542641271. The reversal of 77542641268 is 86214624577.

It is a super-2 number, since 2×77542641268² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9218280 + ... + 9226687.

Almost surely, 2^77542641268 is an apocalyptic number.

It is an amenable number.

77542641268 is a deficient number, since it is larger than the sum of its proper divisors (58286103084).

77542641268 is a wasteful number, since it uses less digits than its factorization.

77542641268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446022 (or 18446020 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 52.

The spelling of 77542641268 in words is "seventy-seven billion, five hundred forty-two million, six hundred forty-one thousand, two hundred sixty-eight".