12705002557 has 8 divisors (see below), whose sum is σ = 13685133560. Its totient is φ = 11725274880.

The previous prime is 12705002549. The next prime is 12705002561. The reversal of 12705002557 is 75520050721.

It can be written as a sum of positive squares in 4 ways, for example, as 469545561 + 12235456996 = 21669^2 + 110614^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12705002557 - 2³ = 12705002549 is a prime.

It is a super-2 number, since 2×12705002557² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705002507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33744 + ... + 162937.

It is an arithmetic number, because the mean of its divisors is an integer number (1710641695).

Almost surely, 2^12705002557 is an apocalyptic number.

It is an amenable number.

12705002557 is a deficient number, since it is larger than the sum of its proper divisors (980131003).

12705002557 is a wasteful number, since it uses less digits than its factorization.

12705002557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201663.

The product of its (nonzero) digits is 24500, while the sum is 34.

The spelling of 12705002557 in words is "twelve billion, seven hundred five million, two thousand, five hundred fifty-seven".