40641128387 has 8 divisors (see below), whose sum is σ = 43053302736. Its totient is φ = 38231345152.

The previous prime is 40641128357. The next prime is 40641128393. The reversal of 40641128387 is 78382114604.

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

It is not a de Polignac number, because 40641128387 - 2⁶ = 40641128323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40641128357) 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, 562718 + ... + 630819.

It is an arithmetic number, because the mean of its divisors is an integer number (5381662842).

Almost surely, 2^40641128387 is an apocalyptic number.

40641128387 is a deficient number, since it is larger than the sum of its proper divisors (2412174349).

40641128387 is a wasteful number, since it uses less digits than its factorization.

40641128387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195557.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 40641128387 in words is "forty billion, six hundred forty-one million, one hundred twenty-eight thousand, three hundred eighty-seven".