40015031690 has 8 divisors (see below), whose sum is σ = 72027057060. Its totient is φ = 16006012672.

The previous prime is 40015031689. The next prime is 40015031699. The reversal of 40015031690 is 9613051004.

It can be written as a sum of positive squares in 2 ways, for example, as 38937944929 + 1077086761 = 197327^2 + 32819^2 .

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

It is a super-2 number, since 2×40015031690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40015031699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000751575 + ... + 2000751594.

Almost surely, 2^40015031690 is an apocalyptic number.

40015031690 is a deficient number, since it is larger than the sum of its proper divisors (32012025370).

40015031690 is a wasteful number, since it uses less digits than its factorization.

40015031690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001503176.

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 40015031690 its reverse (9613051004), we get a palindrome (49628082694).

The spelling of 40015031690 in words is "forty billion, fifteen million, thirty-one thousand, six hundred ninety".