77730055185774 has 16 divisors (see below), whose sum is σ = 155462128451280. Its totient is φ = 25909682048640.

The previous prime is 77730055185677. The next prime is 77730055185781. The reversal of 77730055185774 is 47758155003777.

It is a super-2 number, since 2×77730055185774² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83585707 + ... + 84510534.

It is an arithmetic number, because the mean of its divisors is an integer number (9716383028205).

Almost surely, 2^{77730055185774} is an apocalyptic number.

77730055185774 is an abundant number, since it is smaller than the sum of its proper divisors (77732073265506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77730055185774 is a wasteful number, since it uses less digits than its factorization.

77730055185774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168173315.

The product of its (nonzero) digits is 201684000, while the sum is 66.

The spelling of 77730055185774 in words is "seventy-seven trillion, seven hundred thirty billion, fifty-five million, one hundred eighty-five thousand, seven hundred seventy-four".