815341542074 has 4 divisors (see below), whose sum is σ = 1223012313114. Its totient is φ = 407670771036.

The previous prime is 815341542053. The next prime is 815341542091. The reversal of 815341542074 is 470245143518.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 794085943225 + 21255598849 = 891115^2 + 145793^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203835385517 + ... + 203835385520.

Almost surely, 2^815341542074 is an apocalyptic number.

815341542074 is a deficient number, since it is larger than the sum of its proper divisors (407670771040).

815341542074 is a wasteful number, since it uses less digits than its factorization.

815341542074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407670771039.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 815341542074 in words is "eight hundred fifteen billion, three hundred forty-one million, five hundred forty-two thousand, seventy-four".