747779421546 has 48 divisors (see below), whose sum is σ = 1631169522216. Its totient is φ = 247573315968.

The previous prime is 747779421541. The next prime is 747779421581. The reversal of 747779421546 is 645124977747.

It is a happy number.

747779421546 is a `hidden beast` number, since 7 + 47 + 7 + 7 + 9 + 42 + 1 + 546 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 537965038521 + 209814383025 = 733461^2 + 458055^2 .

It is not an unprimeable number, because it can be changed into a prime (747779421541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3035956 + ... + 3273008.

Almost surely, 2^747779421546 is an apocalyptic number.

747779421546 is an abundant number, since it is smaller than the sum of its proper divisors (883390100670).

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

747779421546 is a wasteful number, since it uses less digits than its factorization.

747779421546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238247 (or 238244 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 747779421546 in words is "seven hundred forty-seven billion, seven hundred seventy-nine million, four hundred twenty-one thousand, five hundred forty-six".