158501640 has 64 divisors (see below), whose sum is σ = 518736960. Its totient is φ = 38424320.

The previous prime is 158501633. The next prime is 158501647. The reversal of 158501640 is 46105851.

It is an interprime number because it is at equal distance from previous prime (158501633) and next prime (158501647).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 158501598 and 158501607.

It is not an unprimeable number, because it can be changed into a prime (158501647) 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 15 ways as a sum of consecutive naturals, for example, 58719 + ... + 61358.

It is an arithmetic number, because the mean of its divisors is an integer number (8105265).

Almost surely, 2^158501640 is an apocalyptic number.

158501640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158501640 is an abundant number, since it is smaller than the sum of its proper divisors (360235320).

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

158501640 is a wasteful number, since it uses less digits than its factorization.

158501640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120102 (or 120098 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 158501640 is about 12589.7434445663. The cubic root of 158501640 is about 541.1835494552.

The spelling of 158501640 in words is "one hundred fifty-eight million, five hundred one thousand, six hundred forty".