158561012 has 6 divisors (see below), whose sum is σ = 277481778. Its totient is φ = 79280504.

The previous prime is 158561003. The next prime is 158561017. The reversal of 158561012 is 210165851.

It can be written as a sum of positive squares in only one way, i.e., 155650576 + 2910436 = 12476^2 + 1706^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158561017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19820123 + ... + 19820130.

It is an arithmetic number, because the mean of its divisors is an integer number (46246963).

Almost surely, 2^158561012 is an apocalyptic number.

It is an amenable number.

158561012 is a deficient number, since it is larger than the sum of its proper divisors (118920766).

158561012 is a wasteful number, since it uses less digits than its factorization.

158561012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39640257 (or 39640255 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 158561012 is about 12592.1011749430. The cubic root of 158561012 is about 541.2511137164.

The spelling of 158561012 in words is "one hundred fifty-eight million, five hundred sixty-one thousand, twelve".