405261001541 has 4 divisors (see below), whose sum is σ = 442102910784. Its totient is φ = 368419092300.

The previous prime is 405261001529. The next prime is 405261001573. The reversal of 405261001541 is 145100162504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405261001541 - 2⁶ = 405261001477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405261001241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18420954605 + ... + 18420954626.

It is an arithmetic number, because the mean of its divisors is an integer number (110525727696).

Almost surely, 2^405261001541 is an apocalyptic number.

It is an amenable number.

405261001541 is a deficient number, since it is larger than the sum of its proper divisors (36841909243).

405261001541 is a wasteful number, since it uses less digits than its factorization.

405261001541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36841909242.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 405261001541 in words is "four hundred five billion, two hundred sixty-one million, one thousand, five hundred forty-one".