40154949769 has 9 divisors (see below), whose sum is σ = 44139681831. Its totient is φ = 36502495920.

The previous prime is 40154949761. The next prime is 40154949787. The reversal of 40154949769 is 96794945104.

The square root of 40154949769 is 200387.

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

40154949769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9147966025 + 31006983744 = 95645^2 + 176088^2 .

It is not a de Polignac number, because 40154949769 - 2³ = 40154949761 is a prime.

It is a super-2 number, since 2×40154949769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40154949761) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2195149 + ... + 2213365.

Almost surely, 2^40154949769 is an apocalyptic number.

40154949769 is the 200387-th square number.

40154949769 is the 100194-th centered octagonal number.

It is an amenable number.

40154949769 is a deficient number, since it is larger than the sum of its proper divisors (3984732062).

40154949769 is an frugal number, since it uses more digits than its factorization.

40154949769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36456 (or 18228 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 40154949769 in words is "forty billion, one hundred fifty-four million, nine hundred forty-nine thousand, seven hundred sixty-nine".