331977223778 has 54 divisors (see below), whose sum is σ = 539716963617. Its totient is φ = 153123605280.

The previous prime is 331977223771. The next prime is 331977223783. The reversal of 331977223778 is 877322779133.

It can be written as a sum of positive squares in 2 ways, for example, as 237084269569 + 94892954209 = 486913^2 + 308047^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=407417.

It is a super-2 number, since 2×331977223778² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331977223771) 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 26 ways as a sum of consecutive naturals, for example, 634755425 + ... + 634755947.

Almost surely, 2^331977223778 is an apocalyptic number.

331977223778 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

331977223778 is a deficient number, since it is larger than the sum of its proper divisors (207739739839).

331977223778 is an frugal number, since it uses more digits than its factorization.

331977223778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168 (or 585 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 59.

The spelling of 331977223778 in words is "three hundred thirty-one billion, nine hundred seventy-seven million, two hundred twenty-three thousand, seven hundred seventy-eight".