1361253647665 has 8 divisors (see below), whose sum is σ = 1634923588608. Its totient is φ = 1088056777200.

The previous prime is 1361253647647. The next prime is 1361253647671. The reversal of 1361253647665 is 5667463521631.

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

It is not a de Polignac number, because 1361253647665 - 2¹⁷ = 1361253516593 is a prime.

It is a super-2 number, since 2×1361253647665² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118261287 + ... + 118272796.

It is an arithmetic number, because the mean of its divisors is an integer number (204365448576).

Almost surely, 2^{1361253647665} is an apocalyptic number.

It is an amenable number.

1361253647665 is a deficient number, since it is larger than the sum of its proper divisors (273669940943).

1361253647665 is a wasteful number, since it uses less digits than its factorization.

1361253647665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236535239.

The product of its digits is 16329600, while the sum is 55.

The spelling of 1361253647665 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred forty-seven thousand, six hundred sixty-five".