5401165808251 has 4 divisors (see below), whose sum is σ = 5401175837904. Its totient is φ = 5401155778600.

The previous prime is 5401165808239. The next prime is 5401165808257. The reversal of 5401165808251 is 1528085611045.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5401165808251 - 2⁵ = 5401165808219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5401165808257) 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, 4158280 + ... + 5300341.

It is an arithmetic number, because the mean of its divisors is an integer number (1350293959476).

Almost surely, 2^{5401165808251} is an apocalyptic number.

5401165808251 is a deficient number, since it is larger than the sum of its proper divisors (10029653).

5401165808251 is an equidigital number, since it uses as much as digits as its factorization.

5401165808251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029652.

The product of its (nonzero) digits is 384000, while the sum is 46.

The spelling of 5401165808251 in words is "five trillion, four hundred one billion, one hundred sixty-five million, eight hundred eight thousand, two hundred fifty-one".