263474738145 has 40 divisors (see below), whose sum is σ = 475033064616. Its totient is φ = 139707569664.

The previous prime is 263474738071. The next prime is 263474738147. The reversal of 263474738145 is 541837474362.

263474738145 is a `hidden beast` number, since 2 + 63 + 474 + 73 + 8 + 1 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 163471427856 + 100003310289 = 404316^2 + 316233^2 .

It is not a de Polignac number, because 263474738145 - 2¹⁶ = 263474672609 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 263474738091 and 263474738100.

It is not an unprimeable number, because it can be changed into a prime (263474738147) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1810152 + ... + 1950281.

Almost surely, 2^263474738145 is an apocalyptic number.

It is an amenable number.

263474738145 is a deficient number, since it is larger than the sum of its proper divisors (211558326471).

263474738145 is a wasteful number, since it uses less digits than its factorization.

263474738145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760623 (or 3760614 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 54.

The spelling of 263474738145 in words is "two hundred sixty-three billion, four hundred seventy-four million, seven hundred thirty-eight thousand, one hundred forty-five".