1285730957069 has 16 divisors (see below), whose sum is σ = 1386982926000. Its totient is φ = 1184816349696.

The previous prime is 1285730957051. The next prime is 1285730957081. The reversal of 1285730957069 is 9607590375821.

It can be written as a sum of positive squares in 8 ways, for example, as 603438436969 + 682292520100 = 776813^2 + 826010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285730957069 is a prime.

It is a super-2 number, since 2×1285730957069² (a number of 25 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 (1285730957009) 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, 18689267 + ... + 18757935.

It is an arithmetic number, because the mean of its divisors is an integer number (86686432875).

Almost surely, 2^{1285730957069} is an apocalyptic number.

It is an amenable number.

1285730957069 is a deficient number, since it is larger than the sum of its proper divisors (101251968931).

1285730957069 is a wasteful number, since it uses less digits than its factorization.

1285730957069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71104.

The product of its (nonzero) digits is 28576800, while the sum is 62.

The spelling of 1285730957069 in words is "one trillion, two hundred eighty-five billion, seven hundred thirty million, nine hundred fifty-seven thousand, sixty-nine".