72158157429 has 4 divisors (see below), whose sum is σ = 96210876576. Its totient is φ = 48105438284.

The previous prime is 72158157377. The next prime is 72158157431. The reversal of 72158157429 is 92475185127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72158157429 - 2²⁰ = 72157108853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72158157499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12026359569 + ... + 12026359574.

It is an arithmetic number, because the mean of its divisors is an integer number (24052719144).

Almost surely, 2^72158157429 is an apocalyptic number.

It is an amenable number.

72158157429 is a deficient number, since it is larger than the sum of its proper divisors (24052719147).

72158157429 is a wasteful number, since it uses less digits than its factorization.

72158157429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24052719146.

The product of its digits is 1411200, while the sum is 51.

The spelling of 72158157429 in words is "seventy-two billion, one hundred fifty-eight million, one hundred fifty-seven thousand, four hundred twenty-nine".