1405640666433 has 8 divisors (see below), whose sum is σ = 1972829005600. Its totient is φ = 887773052448.

The previous prime is 1405640666431. The next prime is 1405640666449. The reversal of 1405640666433 is 3346660465041.

It is a happy number.

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

It is not a de Polignac number, because 1405640666433 - 2¹ = 1405640666431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405640666431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12330181228 + ... + 12330181341.

It is an arithmetic number, because the mean of its divisors is an integer number (246603625700).

Almost surely, 2^{1405640666433} is an apocalyptic number.

It is an amenable number.

1405640666433 is a deficient number, since it is larger than the sum of its proper divisors (567188339167).

1405640666433 is a wasteful number, since it uses less digits than its factorization.

1405640666433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24660362591.

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 1405640666433 in words is "one trillion, four hundred five billion, six hundred forty million, six hundred sixty-six thousand, four hundred thirty-three".