72525637277 has 4 divisors (see below), whose sum is σ = 72547426620. Its totient is φ = 72503847936.

The previous prime is 72525637267. The next prime is 72525637291. The reversal of 72525637277 is 77273652527.

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 45177077401 + 27348559876 = 212549^2 + 165374^2 .

It is a cyclic number.

It is not a de Polignac number, because 72525637277 - 2¹² = 72525633181 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 (72525637267) 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, 10889678 + ... + 10896335.

It is an arithmetic number, because the mean of its divisors is an integer number (18136856655).

Almost surely, 2^72525637277 is an apocalyptic number.

It is an amenable number.

72525637277 is a deficient number, since it is larger than the sum of its proper divisors (21789343).

72525637277 is a wasteful number, since it uses less digits than its factorization.

72525637277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21789342.

The product of its digits is 8643600, while the sum is 53.

The spelling of 72525637277 in words is "seventy-two billion, five hundred twenty-five million, six hundred thirty-seven thousand, two hundred seventy-seven".