72437000077 has 4 divisors (see below), whose sum is σ = 78009077020. Its totient is φ = 66864923136.

The previous prime is 72437000039. The next prime is 72437000093. The reversal of 72437000077 is 77000073427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38097574596 + 34339425481 = 195186^2 + 185309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72437000077 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 (72437000177) 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, 2786038452 + ... + 2786038477.

It is an arithmetic number, because the mean of its divisors is an integer number (19502269255).

Almost surely, 2^72437000077 is an apocalyptic number.

It is an amenable number.

72437000077 is a deficient number, since it is larger than the sum of its proper divisors (5572076943).

72437000077 is a wasteful number, since it uses less digits than its factorization.

72437000077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572076942.

The product of its (nonzero) digits is 57624, while the sum is 37.

The spelling of 72437000077 in words is "seventy-two billion, four hundred thirty-seven million, seventy-seven", and thus it is an aban number.