15541435461 has 4 divisors (see below), whose sum is σ = 20721913952. Its totient is φ = 10360956972.

The previous prime is 15541435423. The next prime is 15541435463. The reversal of 15541435461 is 16453414551.

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 not a de Polignac number, because 15541435461 - 2⁶ = 15541435397 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 (15541435463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590239241 + ... + 2590239246.

It is an arithmetic number, because the mean of its divisors is an integer number (5180478488).

Almost surely, 2^15541435461 is an apocalyptic number.

It is an amenable number.

15541435461 is a deficient number, since it is larger than the sum of its proper divisors (5180478491).

15541435461 is an equidigital number, since it uses as much as digits as its factorization.

15541435461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180478490.

The product of its digits is 144000, while the sum is 39.

The spelling of 15541435461 in words is "fifteen billion, five hundred forty-one million, four hundred thirty-five thousand, four hundred sixty-one".