40157251586989 has 4 divisors (see below), whose sum is σ = 40158940806556. Its totient is φ = 40155562367424.

The previous prime is 40157251586941. The next prime is 40157251586993. The reversal of 40157251586989 is 98968515275104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2909299914889 + 37247951672100 = 1705667^2 + 6103110^2 .

It is a cyclic number.

It is not a de Polignac number, because 40157251586989 - 2²⁵ = 40157218032557 is a prime.

It is a super-3 number, since 3×40157251586989³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40157251586909) 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, 844574124 + ... + 844621669.

It is an arithmetic number, because the mean of its divisors is an integer number (10039735201639).

Almost surely, 2^{40157251586989} is an apocalyptic number.

It is an amenable number.

40157251586989 is a deficient number, since it is larger than the sum of its proper divisors (1689219567).

40157251586989 is a wasteful number, since it uses less digits than its factorization.

40157251586989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689219566.

The product of its (nonzero) digits is 217728000, while the sum is 70.

The spelling of 40157251586989 in words is "forty trillion, one hundred fifty-seven billion, two hundred fifty-one million, five hundred eighty-six thousand, nine hundred eighty-nine".