42240506645 has 16 divisors (see below), whose sum is σ = 53797819248. Its totient is φ = 31729044480.

The previous prime is 42240506639. The next prime is 42240506653. The reversal of 42240506645 is 54660504224.

It can be written as a sum of positive squares in 8 ways, for example, as 196644529 + 42043862116 = 14023^2 + 205046^2 .

It is not a de Polignac number, because 42240506645 - 2¹⁴ = 42240490261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42240506599 and 42240506608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554414 + ... + 625983.

It is an arithmetic number, because the mean of its divisors is an integer number (3362363703).

Almost surely, 2^42240506645 is an apocalyptic number.

It is an amenable number.

42240506645 is a deficient number, since it is larger than the sum of its proper divisors (11557312603).

42240506645 is a wasteful number, since it uses less digits than its factorization.

42240506645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180840.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 42240506645 in words is "forty-two billion, two hundred forty million, five hundred six thousand, six hundred forty-five".