1361253666057 has 16 divisors (see below), whose sum is σ = 1843141704768. Its totient is φ = 893508670400.

The previous prime is 1361253665999. The next prime is 1361253666083. The reversal of 1361253666057 is 7506663521631.

It is a cyclic number.

It is not a de Polignac number, because 1361253666057 - 2¹² = 1361253661961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1361253666457) 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, 9256194 + ... + 9402107.

It is an arithmetic number, because the mean of its divisors is an integer number (115196356548).

Almost surely, 2^{1361253666057} is an apocalyptic number.

It is an amenable number.

1361253666057 is a deficient number, since it is larger than the sum of its proper divisors (481888038711).

1361253666057 is a wasteful number, since it uses less digits than its factorization.

1361253666057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18658680.

The product of its (nonzero) digits is 4082400, while the sum is 51.

The spelling of 1361253666057 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-six thousand, fifty-seven".