77773236556 has 24 divisors (see below), whose sum is σ = 144161107776. Its totient is φ = 36585995520.

The previous prime is 77773236533. The next prime is 77773236557. The reversal of 77773236556 is 65563237777.

It is a super-2 number, since 2×77773236556² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77773236556.

It is not an unprimeable number, because it can be changed into a prime (77773236557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14260 + ... + 394651.

It is an arithmetic number, because the mean of its divisors is an integer number (6006712824).

Almost surely, 2^77773236556 is an apocalyptic number.

It is an amenable number.

77773236556 is a deficient number, since it is larger than the sum of its proper divisors (66387871220).

77773236556 is a wasteful number, since it uses less digits than its factorization.

77773236556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411729 (or 411727 counting only the distinct ones).

The product of its digits is 38896200, while the sum is 58.

The spelling of 77773236556 in words is "seventy-seven billion, seven hundred seventy-three million, two hundred thirty-six thousand, five hundred fifty-six".