158321236720 has 20 divisors (see below), whose sum is σ = 368096875560. Its totient is φ = 63328494656.

The previous prime is 158321236639. The next prime is 158321236751. The reversal of 158321236720 is 27632123851.

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

It is a super-2 number, since 2×158321236720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989507650 + ... + 989507809.

It is an arithmetic number, because the mean of its divisors is an integer number (18404843778).

Almost surely, 2^158321236720 is an apocalyptic number.

158321236720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158321236720 is an abundant number, since it is smaller than the sum of its proper divisors (209775638840).

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

158321236720 is a wasteful number, since it uses less digits than its factorization.

158321236720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979015472 (or 1979015466 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 158321236720 in words is "one hundred fifty-eight billion, three hundred twenty-one million, two hundred thirty-six thousand, seven hundred twenty".