77773628480 has 56 divisors (see below), whose sum is σ = 185222787288. Its totient is φ = 31105363968.

The previous prime is 77773628467. The next prime is 77773628497. The reversal of 77773628480 is 8482637777.

It can be written as a sum of positive squares in 4 ways, for example, as 3759161344 + 74014467136 = 61312^2 + 272056^2 .

It is a super-2 number, since 2×77773628480² (a number of 23 digits) contains 22 as substring.

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, 3995732 + ... + 4015148.

It is an arithmetic number, because the mean of its divisors is an integer number (3307549773).

Almost surely, 2^77773628480 is an apocalyptic number.

It is an amenable number.

77773628480 is an abundant number, since it is smaller than the sum of its proper divisors (107449158808).

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

77773628480 is a wasteful number, since it uses less digits than its factorization.

77773628480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31951 (or 31941 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 59.

The spelling of 77773628480 in words is "seventy-seven billion, seven hundred seventy-three million, six hundred twenty-eight thousand, four hundred eighty".