2945406624557 has 4 divisors (see below), whose sum is σ = 2945965212540. Its totient is φ = 2944848036576.

The previous prime is 2945406624509. The next prime is 2945406624571. The reversal of 2945406624557 is 7554266045492.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2213516108521 + 731890516036 = 1487789^2 + 855506^2 .

It is a cyclic number.

It is not a de Polignac number, because 2945406624557 - 2¹² = 2945406620461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2945406624496 and 2945406624505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2945406624157) 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, 279286082 + ... + 279296627.

It is an arithmetic number, because the mean of its divisors is an integer number (736491303135).

Almost surely, 2^{2945406624557} is an apocalyptic number.

It is an amenable number.

2945406624557 is a deficient number, since it is larger than the sum of its proper divisors (558587983).

2945406624557 is an equidigital number, since it uses as much as digits as its factorization.

2945406624557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558587982.

The product of its (nonzero) digits is 72576000, while the sum is 59.

The spelling of 2945406624557 in words is "two trillion, nine hundred forty-five billion, four hundred six million, six hundred twenty-four thousand, five hundred fifty-seven".