77027172139 has 4 divisors (see below), whose sum is σ = 77151610840. Its totient is φ = 76902733440.

The previous prime is 77027172121. The next prime is 77027172149. The reversal of 77027172139 is 93127172077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93127172077 = 79 ⋅1178824963.

It is a cyclic number.

It is not a de Polignac number, because 77027172139 - 2¹³ = 77027163947 is a prime.

It is a super-2 number, since 2×77027172139² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77027172149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62218422 + ... + 62219659.

It is an arithmetic number, because the mean of its divisors is an integer number (19287902710).

Almost surely, 2^77027172139 is an apocalyptic number.

77027172139 is a deficient number, since it is larger than the sum of its proper divisors (124438701).

77027172139 is a wasteful number, since it uses less digits than its factorization.

77027172139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124438700.

The product of its (nonzero) digits is 259308, while the sum is 46.

The spelling of 77027172139 in words is "seventy-seven billion, twenty-seven million, one hundred seventy-two thousand, one hundred thirty-nine".