40998555361 has 3 divisors (see below), whose sum is σ = 40998757843. Its totient is φ = 40998352880.

The previous prime is 40998555349. The next prime is 40998555373. The reversal of 40998555361 is 16355589904.

The square root of 40998555361 is 202481.

It is a perfect power (a square), and thus also a powerful number.

40998555361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (40998555349) and next prime (40998555373).

It can be written as a sum of positive squares in only one way, i.e., 7450969761 + 33547585600 = 86319^2 + 183160^2 .

It is not a de Polignac number, because 40998555361 - 2⁵ = 40998555329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40978555361) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101241 + ... + 303721.

Almost surely, 2^40998555361 is an apocalyptic number.

40998555361 is the 202481-st square number.

40998555361 is the 101241-st centered octagonal number.

It is an amenable number.

40998555361 is a deficient number, since it is larger than the sum of its proper divisors (202482).

40998555361 is an frugal number, since it uses more digits than its factorization.

40998555361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404962 (or 202481 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 40998555361 in words is "forty billion, nine hundred ninety-eight million, five hundred fifty-five thousand, three hundred sixty-one".