1206078382657 has 8 divisors (see below), whose sum is σ = 1209366625896. Its totient is φ = 1202790433152.

The previous prime is 1206078382643. The next prime is 1206078382693. The reversal of 1206078382657 is 7562838706021.

It is a Cunningham number, because it is equal to 1098216²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 655575224976 + 550503157681 = 809676^2 + 741959^2 .

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 1206078382657 - 2⁷ = 1206078382529 is a prime.

It is a super-2 number, since 2×1206078382657² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206078382598 and 1206078382607.

It is not an unprimeable number, because it can be changed into a prime (1206078380657) 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, 10040013 + ... + 10159429.

It is an arithmetic number, because the mean of its divisors is an integer number (151170828237).

Almost surely, 2^{1206078382657} is an apocalyptic number.

It is an amenable number.

1206078382657 is a deficient number, since it is larger than the sum of its proper divisors (3288243239).

1206078382657 is a wasteful number, since it uses less digits than its factorization.

1206078382657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146867.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 1206078382657 in words is "one trillion, two hundred six billion, seventy-eight million, three hundred eighty-two thousand, six hundred fifty-seven".