77540926699987 has 2 divisors, whose sum is σ = 77540926699988. Its totient is φ = 77540926699986.

The previous prime is 77540926699981. The next prime is 77540926700093. The reversal of 77540926699987 is 78999662904577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77540926699987 - 2¹¹ = 77540926697939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77540926699898 and 77540926699907.

It is not a weakly prime, because it can be changed into another prime (77540926699981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38770463349993 + 38770463349994.

It is an arithmetic number, because the mean of its divisors is an integer number (38770463349994).

Almost surely, 2^{77540926699987} is an apocalyptic number.

77540926699987 is a deficient number, since it is larger than the sum of its proper divisors (1).

77540926699987 is an equidigital number, since it uses as much as digits as its factorization.

77540926699987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25924872960, while the sum is 88.

The spelling of 77540926699987 in words is "seventy-seven trillion, five hundred forty billion, nine hundred twenty-six million, six hundred ninety-nine thousand, nine hundred eighty-seven".