40157581663 has 8 divisors (see below), whose sum is σ = 40345110288. Its totient is φ = 39970359744.

The previous prime is 40157581649. The next prime is 40157581703. The reversal of 40157581663 is 36618575104.

It is a happy number.

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 40157581663 - 2¹³ = 40157573471 is a prime.

It is a super-2 number, since 2×40157581663² (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 (40157581463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187920 + ... + 340042.

It is an arithmetic number, because the mean of its divisors is an integer number (5043138786).

Almost surely, 2^40157581663 is an apocalyptic number.

40157581663 is a deficient number, since it is larger than the sum of its proper divisors (187528625).

40157581663 is a wasteful number, since it uses less digits than its factorization.

40157581663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153353.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 40157581663 in words is "forty billion, one hundred fifty-seven million, five hundred eighty-one thousand, six hundred sixty-three".