77893039877 has 4 divisors (see below), whose sum is σ = 77894765676. Its totient is φ = 77891314080.

The previous prime is 77893039871. The next prime is 77893039883.

77893039877 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (77893039871) and next prime (77893039883).

It can be written as a sum of positive squares in 2 ways, for example, as 45048364516 + 32844675361 = 212246^2 + 181231^2 .

It is a cyclic number.

It is not a de Polignac number, because 77893039877 - 2¹⁴ = 77893023493 is a prime.

It is a super-2 number, since 2×77893039877² (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 (77893039871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793328 + ... + 886089.

It is an arithmetic number, because the mean of its divisors is an integer number (19473691419).

Almost surely, 2^77893039877 is an apocalyptic number.

It is an amenable number.

77893039877 is a deficient number, since it is larger than the sum of its proper divisors (1725799).

77893039877 is a wasteful number, since it uses less digits than its factorization.

77893039877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725798.

The product of its (nonzero) digits is 112021056, while the sum is 68.

The spelling of 77893039877 in words is "seventy-seven billion, eight hundred ninety-three million, thirty-nine thousand, eight hundred seventy-seven".