6834478157 has 8 divisors (see below), whose sum is σ = 7371088536. Its totient is φ = 6299422272.

The previous prime is 6834478153. The next prime is 6834478223. The reversal of 6834478157 is 7518744386.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 571496836 + 6262981321 = 23906^2 + 79139^2 .

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

It is not a de Polignac number, because 6834478157 - 2² = 6834478153 is a prime.

It is a super-3 number, since 3×6834478157³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6834478099 and 6834478108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6834478153) 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, 379478 + ... + 397079.

It is an arithmetic number, because the mean of its divisors is an integer number (921386067).

Almost surely, 2^6834478157 is an apocalyptic number.

It is an amenable number.

6834478157 is a deficient number, since it is larger than the sum of its proper divisors (536610379).

6834478157 is a wasteful number, since it uses less digits than its factorization.

6834478157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777247.

The product of its digits is 4515840, while the sum is 53.

The square root of 6834478157 is about 82670.9027227839. The cubic root of 6834478157 is about 1897.7330448626.

The spelling of 6834478157 in words is "six billion, eight hundred thirty-four million, four hundred seventy-eight thousand, one hundred fifty-seven".