40641557 has 8 divisors (see below), whose sum is σ = 45865440. Its totient is φ = 35672560.

The previous prime is 40641547. The next prime is 40641563. The reversal of 40641557 is 75514604.

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

It is not a de Polignac number, because 40641557 - 2⁴ = 40641541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641547) 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, 63383 + ... + 64020.

It is an arithmetic number, because the mean of its divisors is an integer number (5733180).

Almost surely, 2^40641557 is an apocalyptic number.

It is an amenable number.

40641557 is a deficient number, since it is larger than the sum of its proper divisors (5223883).

40641557 is a wasteful number, since it uses less digits than its factorization.

40641557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127443.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 40641557 is about 6375.0730976201. The cubic root of 40641557 is about 343.8139119952.

The spelling of 40641557 in words is "forty million, six hundred forty-one thousand, five hundred fifty-seven".