40008747385491 has 8 divisors (see below), whose sum is σ = 53357411005584. Its totient is φ = 26666291011200.

The previous prime is 40008747385489. The next prime is 40008747385549. The reversal of 40008747385491 is 19458374780004.

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

It is not a de Polignac number, because 40008747385491 - 2¹ = 40008747385489 is a prime.

It is a super-2 number, since 2×40008747385491² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40008747485491) 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, 1551796410 + ... + 1551822191.

It is an arithmetic number, because the mean of its divisors is an integer number (6669676375698).

Almost surely, 2^{40008747385491} is an apocalyptic number.

40008747385491 is a deficient number, since it is larger than the sum of its proper divisors (13348663620093).

40008747385491 is a wasteful number, since it uses less digits than its factorization.

40008747385491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103622901.

The product of its (nonzero) digits is 27095040, while the sum is 60.

The spelling of 40008747385491 in words is "forty trillion, eight billion, seven hundred forty-seven million, three hundred eighty-five thousand, four hundred ninety-one".