158401761 has 12 divisors (see below), whose sum is σ = 245684592. Its totient is φ = 90515208.

The previous prime is 158401757. The next prime is 158401777. The reversal of 158401761 is 167104851.

It is a happy number.

It is not a de Polignac number, because 158401761 - 2² = 158401757 is a prime.

It is a super-2 number, since 2×158401761² = 50182235775802242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158401721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538635 + ... + 538928.

It is an arithmetic number, because the mean of its divisors is an integer number (20473716).

Almost surely, 2^158401761 is an apocalyptic number.

It is an amenable number.

158401761 is a deficient number, since it is larger than the sum of its proper divisors (87282831).

158401761 is a wasteful number, since it uses less digits than its factorization.

158401761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077580 (or 1077573 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 158401761 is about 12585.7761381649. The cubic root of 158401761 is about 541.0698508852.

The spelling of 158401761 in words is "one hundred fifty-eight million, four hundred one thousand, seven hundred sixty-one".