2985906031557 has 16 divisors (see below), whose sum is σ = 3989829795840. Its totient is φ = 1986293792432.

The previous prime is 2985906031529. The next prime is 2985906031567. The reversal of 2985906031557 is 7551306095892.

It is a cyclic number.

It is not a de Polignac number, because 2985906031557 - 2¹⁰ = 2985906030533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2985906031557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2985906031567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20169268 + ... + 20316770.

It is an arithmetic number, because the mean of its divisors is an integer number (249364362240).

Almost surely, 2^{2985906031557} is an apocalyptic number.

It is an amenable number.

2985906031557 is a deficient number, since it is larger than the sum of its proper divisors (1003923764283).

2985906031557 is a wasteful number, since it uses less digits than its factorization.

2985906031557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162072.

The product of its (nonzero) digits is 20412000, while the sum is 60.

The spelling of 2985906031557 in words is "two trillion, nine hundred eighty-five billion, nine hundred six million, thirty-one thousand, five hundred fifty-seven".