158550640 has 20 divisors (see below), whose sum is σ = 368630424. Its totient is φ = 63420224.

The previous prime is 158550631. The next prime is 158550643. The reversal of 158550640 is 46055851.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 158550596 and 158550605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158550643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990862 + ... + 991021.

Almost surely, 2^158550640 is an apocalyptic number.

158550640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158550640 is an abundant number, since it is smaller than the sum of its proper divisors (210079784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158550640 is a wasteful number, since it uses less digits than its factorization.

158550640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981896 (or 1981890 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 158550640 is about 12591.6893227239. The cubic root of 158550640 is about 541.2393117841.

It can be divided in two parts, 1585 and 50640, that added together give a palindrome (52225).

The spelling of 158550640 in words is "one hundred fifty-eight million, five hundred fifty thousand, six hundred forty".