158278477 has 6 divisors (see below), whose sum is σ = 184119918. Its totient is φ = 135667224.

The previous prime is 158278457. The next prime is 158278499. The reversal of 158278477 is 774872851.

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 47734281 = 10514^2 + 6909^2 .

It is not a de Polignac number, because 158278477 - 2¹¹ = 158276429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 3230173 = 158278477 / (1 + 5 + 8 + 2 + 7 + 8 + 4 + 7 + 7).

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 158278477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158278457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1615038 + ... + 1615135.

It is an arithmetic number, because the mean of its divisors is an integer number (30686653).

Almost surely, 2^158278477 is an apocalyptic number.

It is an amenable number.

158278477 is a deficient number, since it is larger than the sum of its proper divisors (25841441).

158278477 is an equidigital number, since it uses as much as digits as its factorization.

158278477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230187 (or 3230180 counting only the distinct ones).

The product of its digits is 878080, while the sum is 49.

The square root of 158278477 is about 12580.8774336292. The cubic root of 158278477 is about 540.9294430006.

The spelling of 158278477 in words is "one hundred fifty-eight million, two hundred seventy-eight thousand, four hundred seventy-seven".