623648745 has 48 divisors (see below), whose sum is σ = 1114927632. Its totient is φ = 322283520.

The previous prime is 623648699. The next prime is 623648747. The reversal of 623648745 is 547846326.

It can be written as a sum of positive squares in 8 ways, for example, as 267911424 + 355737321 = 16368^2 + 18861^2 .

It is not a de Polignac number, because 623648745 - 2⁶ = 623648681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 623648745.

It is not an unprimeable number, because it can be changed into a prime (623648747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288589 + ... + 290741.

It is an arithmetic number, because the mean of its divisors is an integer number (23227659).

Almost surely, 2^623648745 is an apocalyptic number.

It is an amenable number.

623648745 is a deficient number, since it is larger than the sum of its proper divisors (491278887).

623648745 is a wasteful number, since it uses less digits than its factorization.

623648745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2359 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 623648745 is about 24972.9602770677. The cubic root of 623648745 is about 854.3713651412.

The spelling of 623648745 in words is "six hundred twenty-three million, six hundred forty-eight thousand, seven hundred forty-five".