1808615418772 has 6 divisors (see below), whose sum is σ = 3165076982858. Its totient is φ = 904307709384.

The previous prime is 1808615418761. The next prime is 1808615418803. The reversal of 1808615418772 is 2778145168081.

It can be written as a sum of positive squares in only one way, i.e., 1720409982736 + 88205436036 = 1311644^2 + 296994^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 226076927343 + ... + 226076927350.

Almost surely, 2^{1808615418772} is an apocalyptic number.

It is an amenable number.

1808615418772 is a deficient number, since it is larger than the sum of its proper divisors (1356461564086).

1808615418772 is a wasteful number, since it uses less digits than its factorization.

1808615418772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452153854697 (or 452153854695 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 58.

The spelling of 1808615418772 in words is "one trillion, eight hundred eight billion, six hundred fifteen million, four hundred eighteen thousand, seven hundred seventy-two".