158011815049 has 9 divisors (see below), whose sum is σ = 173687214631. Its totient is φ = 143643129520.

The previous prime is 158011815047. The next prime is 158011815079. The reversal of 158011815049 is 940518110851.

The square root of 158011815049 is 397507.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 94491686025 + 63520129024 = 307395^2 + 252032^2 .

It is not a de Polignac number, because 158011815049 - 2¹ = 158011815047 is a prime.

It is a super-4 number, since 4×158011815049⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158011814996 and 158011815014.

It is not an unprimeable number, because it can be changed into a prime (158011815041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4354509 + ... + 4390645.

Almost surely, 2^158011815049 is an apocalyptic number.

158011815049 is the 397507-th square number.

158011815049 is the 198754-th centered octagonal number.

It is an amenable number.

158011815049 is a deficient number, since it is larger than the sum of its proper divisors (15675399582).

158011815049 is an frugal number, since it uses more digits than its factorization.

158011815049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72296 (or 36148 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 43.

The spelling of 158011815049 in words is "one hundred fifty-eight billion, eleven million, eight hundred fifteen thousand, forty-nine".