820454373157 has 8 divisors (see below), whose sum is σ = 821850867200. Its totient is φ = 819058027824.

The previous prime is 820454373143. The next prime is 820454373191. The reversal of 820454373157 is 751373454028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 820454373157 - 2²³ = 820445984549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 820454373157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820454373257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20641819 + ... + 20681527.

It is an arithmetic number, because the mean of its divisors is an integer number (102731358400).

Almost surely, 2^820454373157 is an apocalyptic number.

It is an amenable number.

820454373157 is a deficient number, since it is larger than the sum of its proper divisors (1396494043).

820454373157 is a wasteful number, since it uses less digits than its factorization.

820454373157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74355.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 820454373157 in words is "eight hundred twenty billion, four hundred fifty-four million, three hundred seventy-three thousand, one hundred fifty-seven".