40149387391 has 8 divisors (see below), whose sum is σ = 41280418368. Its totient is φ = 39025584000.

The previous prime is 40149387371. The next prime is 40149387401. The reversal of 40149387391 is 19378394104.

40149387391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40149387391 - 2¹¹ = 40149385343 is a prime.

It is a super-2 number, since 2×40149387391² (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 (40149387371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795630 + ... + 1817851.

It is an arithmetic number, because the mean of its divisors is an integer number (5160052296).

Almost surely, 2^40149387391 is an apocalyptic number.

40149387391 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40149387391 is a deficient number, since it is larger than the sum of its proper divisors (1131030977).

40149387391 is a wasteful number, since it uses less digits than its factorization.

40149387391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613793.

The product of its (nonzero) digits is 653184, while the sum is 49.

It can be divided in two parts, 401493 and 87391, that added together give a palindrome (488884).

The spelling of 40149387391 in words is "forty billion, one hundred forty-nine million, three hundred eighty-seven thousand, three hundred ninety-one".