77737434340 has 12 divisors (see below), whose sum is σ = 163248612156. Its totient is φ = 31094973728.

The previous prime is 77737434323. The next prime is 77737434349. The reversal of 77737434340 is 4343473777.

It can be written as a sum of positive squares in 2 ways, for example, as 40520079616 + 37217354724 = 201296^2 + 192918^2 .

It is a super-2 number, since 2×77737434340² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77737434349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943435839 + ... + 1943435878.

It is an arithmetic number, because the mean of its divisors is an integer number (13604051013).

Almost surely, 2^77737434340 is an apocalyptic number.

It is an amenable number.

77737434340 is an abundant number, since it is smaller than the sum of its proper divisors (85511177816).

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

77737434340 is a wasteful number, since it uses less digits than its factorization.

77737434340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886871726 (or 3886871724 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 49.

The spelling of 77737434340 in words is "seventy-seven billion, seven hundred thirty-seven million, four hundred thirty-four thousand, three hundred forty".