1391661350253 has 24 divisors (see below), whose sum is σ = 2019970337216. Its totient is φ = 923255625600.

The previous prime is 1391661350231. The next prime is 1391661350257. The reversal of 1391661350253 is 3520531661931.

1391661350253 is a `hidden beast` number, since 1 + 3 + 9 + 1 + 6 + 613 + 5 + 0 + 25 + 3 = 666.

It is not a de Polignac number, because 1391661350253 - 2⁸ = 1391661349997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1391661350199 and 1391661350208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391661350257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15738501 + ... + 15826677.

Almost surely, 2^{1391661350253} is an apocalyptic number.

It is an amenable number.

1391661350253 is a deficient number, since it is larger than the sum of its proper divisors (628308986963).

1391661350253 is a wasteful number, since it uses less digits than its factorization.

1391661350253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96705 (or 96702 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The spelling of 1391661350253 in words is "one trillion, three hundred ninety-one billion, six hundred sixty-one million, three hundred fifty thousand, two hundred fifty-three".