72601004261 has 2 divisors, whose sum is σ = 72601004262. Its totient is φ = 72601004260.

The previous prime is 72601004251. The next prime is 72601004299. The reversal of 72601004261 is 16240010627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66259908100 + 6341096161 = 257410^2 + 79631^2 .

It is a cyclic number.

It is not a de Polignac number, because 72601004261 - 2⁶ = 72601004197 is a prime.

It is a super-2 number, since 2×72601004261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72601004251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36300502130 + 36300502131.

It is an arithmetic number, because the mean of its divisors is an integer number (36300502131).

Almost surely, 2^72601004261 is an apocalyptic number.

It is an amenable number.

72601004261 is a deficient number, since it is larger than the sum of its proper divisors (1).

72601004261 is an equidigital number, since it uses as much as digits as its factorization.

72601004261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 72601004261 its reverse (16240010627), we get a palindrome (88841014888).

The spelling of 72601004261 in words is "seventy-two billion, six hundred one million, four thousand, two hundred sixty-one".