157447478 has 4 divisors (see below), whose sum is σ = 236171220. Its totient is φ = 78723738.

The previous prime is 157447463. The next prime is 157447487. The reversal of 157447478 is 874744751.

157447478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39361868 + ... + 39361871.

It is an arithmetic number, because the mean of its divisors is an integer number (59042805).

Almost surely, 2^157447478 is an apocalyptic number.

157447478 is a deficient number, since it is larger than the sum of its proper divisors (78723742).

157447478 is an equidigital number, since it uses as much as digits as its factorization.

157447478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78723741.

The product of its digits is 878080, while the sum is 47.

The square root of 157447478 is about 12547.8076969644. The cubic root of 157447478 is about 539.9811127367.

The spelling of 157447478 in words is "one hundred fifty-seven million, four hundred forty-seven thousand, four hundred seventy-eight".