40684741549 has 4 divisors (see below), whose sum is σ = 41452378236. Its totient is φ = 39917104864.

The previous prime is 40684741499. The next prime is 40684741579. The reversal of 40684741549 is 94514748604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35026994025 + 5657747524 = 187155^2 + 75218^2 .

It is a cyclic number.

It is not a de Polignac number, because 40684741549 - 2¹³ = 40684733357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40684741496 and 40684741505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40684741579) 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, 383818264 + ... + 383818369.

It is an arithmetic number, because the mean of its divisors is an integer number (10363094559).

Almost surely, 2^40684741549 is an apocalyptic number.

It is an amenable number.

40684741549 is a deficient number, since it is larger than the sum of its proper divisors (767636687).

40684741549 is an equidigital number, since it uses as much as digits as its factorization.

40684741549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767636686.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 40684741549 in words is "forty billion, six hundred eighty-four million, seven hundred forty-one thousand, five hundred forty-nine".