40154742509 has 24 divisors (see below), whose sum is σ = 49473227520. Its totient is φ = 32383967616.

The previous prime is 40154742491. The next prime is 40154742517. The reversal of 40154742509 is 90524745104.

It is a de Polignac number, because none of the positive numbers 2^k-40154742509 is a prime.

It is a super-2 number, since 2×40154742509² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154742539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4249412 + ... + 4258850.

It is an arithmetic number, because the mean of its divisors is an integer number (2061384480).

Almost surely, 2^40154742509 is an apocalyptic number.

40154742509 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40154742509 is a deficient number, since it is larger than the sum of its proper divisors (9318485011).

40154742509 is a wasteful number, since it uses less digits than its factorization.

40154742509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577 (or 14570 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 40154742509 in words is "forty billion, one hundred fifty-four million, seven hundred forty-two thousand, five hundred nine".