77641377 has 16 divisors (see below), whose sum is σ = 113246208. Its totient is φ = 46924880.

The previous prime is 77641357. The next prime is 77641379. The reversal of 77641377 is 77314677.

It is a cyclic number.

It is not a de Polignac number, because 77641377 - 2¹⁴ = 77624993 is a prime.

It is a super-2 number, since 2×77641377² = 12056366844912258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77641379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9568 + ... + 15710.

It is an arithmetic number, because the mean of its divisors is an integer number (7077888).

Almost surely, 2^77641377 is an apocalyptic number.

It is an amenable number.

77641377 is a deficient number, since it is larger than the sum of its proper divisors (35604831).

77641377 is a wasteful number, since it uses less digits than its factorization.

77641377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540.

The product of its digits is 172872, while the sum is 42.

The square root of 77641377 is about 8811.4344462182. The cubic root of 77641377 is about 426.6100442303.

The spelling of 77641377 in words is "seventy-seven million, six hundred forty-one thousand, three hundred seventy-seven".