40015031689 has 2 divisors, whose sum is σ = 40015031690. Its totient is φ = 40015031688.

The previous prime is 40015031671. The next prime is 40015031699. The reversal of 40015031689 is 98613051004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39664705600 + 350326089 = 199160^2 + 18717^2 .

It is a cyclic number.

It is not a de Polignac number, because 40015031689 - 2⁷ = 40015031561 is a prime.

It is a super-2 number, since 2×40015031689² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40015031629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20007515844 + 20007515845.

It is an arithmetic number, because the mean of its divisors is an integer number (20007515845).

Almost surely, 2^40015031689 is an apocalyptic number.

It is an amenable number.

40015031689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40015031689 is an equidigital number, since it uses as much as digits as its factorization.

40015031689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 40015031689 in words is "forty billion, fifteen million, thirty-one thousand, six hundred eighty-nine".