5571891445154 has 4 divisors (see below), whose sum is σ = 8357837167734. Its totient is φ = 2785945722576.

The previous prime is 5571891445121. The next prime is 5571891445157. The reversal of 5571891445154 is 4515441981755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5492015685025 + 79875760129 = 2343505^2 + 282623^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5571891445093 and 5571891445102.

It is not an unprimeable number, because it can be changed into a prime (5571891445157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392972861287 + ... + 1392972861290.

Almost surely, 2^{5571891445154} is an apocalyptic number.

5571891445154 is a deficient number, since it is larger than the sum of its proper divisors (2785945722580).

5571891445154 is a wasteful number, since it uses less digits than its factorization.

5571891445154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785945722579.

The product of its digits is 20160000, while the sum is 59.

The spelling of 5571891445154 in words is "five trillion, five hundred seventy-one billion, eight hundred ninety-one million, four hundred forty-five thousand, one hundred fifty-four".