72534194801 has 2 divisors, whose sum is σ = 72534194802. Its totient is φ = 72534194800.

The previous prime is 72534194779. The next prime is 72534194809. The reversal of 72534194801 is 10849143527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70875750625 + 1658444176 = 266225^2 + 40724^2 .

It is a cyclic number.

It is not a de Polignac number, because 72534194801 - 2⁶ = 72534194737 is a prime.

It is a super-2 number, since 2×72534194801² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72534194809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36267097400 + 36267097401.

It is an arithmetic number, because the mean of its divisors is an integer number (36267097401).

Almost surely, 2^72534194801 is an apocalyptic number.

It is an amenable number.

72534194801 is a deficient number, since it is larger than the sum of its proper divisors (1).

72534194801 is an equidigital number, since it uses as much as digits as its factorization.

72534194801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 72534194801 in words is "seventy-two billion, five hundred thirty-four million, one hundred ninety-four thousand, eight hundred one".