77749301687 has 8 divisors (see below), whose sum is σ = 81017398800. Its totient is φ = 74520343744.

The previous prime is 77749301653. The next prime is 77749301701. The reversal of 77749301687 is 78610394777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77749301687 - 2¹⁴ = 77749285303 is a prime.

It is a super-2 number, since 2×77749301687² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77749301647) 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 7 ways as a sum of consecutive naturals, for example, 9780737 + ... + 9788682.

It is an arithmetic number, because the mean of its divisors is an integer number (10127174850).

Almost surely, 2^77749301687 is an apocalyptic number.

77749301687 is a deficient number, since it is larger than the sum of its proper divisors (3268097113).

77749301687 is a wasteful number, since it uses less digits than its factorization.

77749301687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19569585.

The product of its (nonzero) digits is 12446784, while the sum is 59.

The spelling of 77749301687 in words is "seventy-seven billion, seven hundred forty-nine million, three hundred one thousand, six hundred eighty-seven".