72142936429 has 4 divisors (see below), whose sum is σ = 73325607580. Its totient is φ = 70960265280.

The previous prime is 72142936423. The next prime is 72142936451. The reversal of 72142936429 is 92463924127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92463924127 = 38011 ⋅2432557.

It can be written as a sum of positive squares in 2 ways, for example, as 24924515625 + 47218420804 = 157875^2 + 217298^2 .

It is a cyclic number.

It is not a de Polignac number, because 72142936429 - 2³ = 72142936421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72142936421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591335484 + ... + 591335605.

It is an arithmetic number, because the mean of its divisors is an integer number (18331401895).

Almost surely, 2^72142936429 is an apocalyptic number.

It is an amenable number.

72142936429 is a deficient number, since it is larger than the sum of its proper divisors (1182671151).

72142936429 is a wasteful number, since it uses less digits than its factorization.

72142936429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182671150.

The product of its digits is 1306368, while the sum is 49.

The spelling of 72142936429 in words is "seventy-two billion, one hundred forty-two million, nine hundred thirty-six thousand, four hundred twenty-nine".