72453770197 has 2 divisors, whose sum is σ = 72453770198. Its totient is φ = 72453770196.

The previous prime is 72453770141. The next prime is 72453770219. The reversal of 72453770197 is 79107735427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38288314276 + 34165455921 = 195674^2 + 184839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72453770197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72453770117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36226885098 + 36226885099.

It is an arithmetic number, because the mean of its divisors is an integer number (36226885099).

Almost surely, 2^72453770197 is an apocalyptic number.

It is an amenable number.

72453770197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72453770197 is an equidigital number, since it uses as much as digits as its factorization.

72453770197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2593080, while the sum is 52.

The spelling of 72453770197 in words is "seventy-two billion, four hundred fifty-three million, seven hundred seventy thousand, one hundred ninety-seven".