10206001557 has 12 divisors (see below), whose sum is σ = 14748621420. Its totient is φ = 6800946048.

The previous prime is 10206001537. The next prime is 10206001573. The reversal of 10206001557 is 75510060201.

10206001557 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 600 + 1 + 5 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6350336721 + 3855664836 = 79689^2 + 62094^2 .

It is not a de Polignac number, because 10206001557 - 2¹⁵ = 10205968789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10206001557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10206001517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233332 + ... + 273597.

It is an arithmetic number, because the mean of its divisors is an integer number (1229051785).

Almost surely, 2^10206001557 is an apocalyptic number.

It is an amenable number.

10206001557 is a deficient number, since it is larger than the sum of its proper divisors (4542619863).

10206001557 is a wasteful number, since it uses less digits than its factorization.

10206001557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509172 (or 509169 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

Adding to 10206001557 its reverse (75510060201), we get a palindrome (85716061758).

The spelling of 10206001557 in words is "ten billion, two hundred six million, one thousand, five hundred fifty-seven".