5421478641757 has 4 divisors (see below), whose sum is σ = 5495745472540. Its totient is φ = 5347211810976.

The previous prime is 5421478641727. The next prime is 5421478641779. The reversal of 5421478641757 is 7571468741245.

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 2376240748036 + 3045237893721 = 1541506^2 + 1745061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5421478641757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5421478641695 and 5421478641704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421478641727) 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, 37133415282 + ... + 37133415427.

It is an arithmetic number, because the mean of its divisors is an integer number (1373936368135).

Almost surely, 2^{5421478641757} is an apocalyptic number.

It is an amenable number.

5421478641757 is a deficient number, since it is larger than the sum of its proper divisors (74266830783).

5421478641757 is an equidigital number, since it uses as much as digits as its factorization.

5421478641757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74266830782.

The product of its digits is 52684800, while the sum is 61.

The spelling of 5421478641757 in words is "five trillion, four hundred twenty-one billion, four hundred seventy-eight million, six hundred forty-one thousand, seven hundred fifty-seven".