613625234440 has 32 divisors (see below), whose sum is σ = 1380679597080. Its totient is φ = 245446036992.

The previous prime is 613625234423. The next prime is 613625234501. The reversal of 613625234440 is 44432526316.

It can be written as a sum of positive squares in 4 ways, for example, as 516015228964 + 97610005476 = 718342^2 + 312426^2 .

It is a super-2 number, since 2×613625234440² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 613625234393 and 613625234402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3912412 + ... + 4066228.

Almost surely, 2^613625234440 is an apocalyptic number.

It is an amenable number.

613625234440 is an abundant number, since it is smaller than the sum of its proper divisors (767054362640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613625234440 is a wasteful number, since it uses less digits than its factorization.

613625234440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253561 (or 253557 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

It can be divided in two parts, 6136 and 25234440, that added together give a square (25240576 = 5024²).

The spelling of 613625234440 in words is "six hundred thirteen billion, six hundred twenty-five million, two hundred thirty-four thousand, four hundred forty".