245654640553 has 4 divisors (see below), whose sum is σ = 280748160640. Its totient is φ = 210561120468.

The previous prime is 245654640479. The next prime is 245654640557. The reversal of 245654640553 is 355046456542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355046456542 = 2 ⋅177523228271.

It is a cyclic number.

It is not a de Polignac number, because 245654640553 - 2²¹ = 245652543401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245654640497 and 245654640506.

It is not an unprimeable number, because it can be changed into a prime (245654640557) 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, 17546760033 + ... + 17546760046.

It is an arithmetic number, because the mean of its divisors is an integer number (70187040160).

Almost surely, 2^245654640553 is an apocalyptic number.

It is an amenable number.

245654640553 is a deficient number, since it is larger than the sum of its proper divisors (35093520087).

245654640553 is an equidigital number, since it uses as much as digits as its factorization.

245654640553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35093520086.

The product of its (nonzero) digits is 8640000, while the sum is 49.

The spelling of 245654640553 in words is "two hundred forty-five billion, six hundred fifty-four million, six hundred forty thousand, five hundred fifty-three".