1361257625563 has 4 divisors (see below), whose sum is σ = 1485008318808. Its totient is φ = 1237506932320.

The previous prime is 1361257625543. The next prime is 1361257625603. The reversal of 1361257625563 is 3655267521631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361257625563 - 2²⁹ = 1360720754651 is a prime.

It is a super-2 number, since 2×1361257625563² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361257625563.

It is not an unprimeable number, because it can be changed into a prime (1361257625503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61875346606 + ... + 61875346627.

It is an arithmetic number, because the mean of its divisors is an integer number (371252079702).

Almost surely, 2^{1361257625563} is an apocalyptic number.

1361257625563 is a deficient number, since it is larger than the sum of its proper divisors (123750693245).

1361257625563 is a wasteful number, since it uses less digits than its factorization.

1361257625563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123750693244.

The product of its digits is 6804000, while the sum is 52.

The spelling of 1361257625563 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-seven million, six hundred twenty-five thousand, five hundred sixty-three".