1405640666245 has 8 divisors (see below), whose sum is σ = 1686778071840. Its totient is φ = 1124506351440.

The previous prime is 1405640666197. The next prime is 1405640666251. The reversal of 1405640666245 is 5426660465041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1405640666245 - 2¹³ = 1405640658053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385710 + ... + 1720480.

It is an arithmetic number, because the mean of its divisors is an integer number (210847258980).

Almost surely, 2^{1405640666245} is an apocalyptic number.

It is an amenable number.

1405640666245 is a deficient number, since it is larger than the sum of its proper divisors (281137405595).

1405640666245 is a wasteful number, since it uses less digits than its factorization.

1405640666245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545395.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 1405640666245 in words is "one trillion, four hundred five billion, six hundred forty million, six hundred sixty-six thousand, two hundred forty-five".