7940161573261 has 2 divisors, whose sum is σ = 7940161573262. Its totient is φ = 7940161573260.

The previous prime is 7940161573217. The next prime is 7940161573349. The reversal of 7940161573261 is 1623751610497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4127475761161 + 3812685812100 = 2031619^2 + 1952610^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940161573261 - 2²⁵ = 7940128018829 is a prime.

It is a super-3 number, since 3×7940161573261³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7940161573199 and 7940161573208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7940161571261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970080786630 + 3970080786631.

It is an arithmetic number, because the mean of its divisors is an integer number (3970080786631).

Almost surely, 2^{7940161573261} is an apocalyptic number.

It is an amenable number.

7940161573261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940161573261 is an equidigital number, since it uses as much as digits as its factorization.

7940161573261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 7940161573261 in words is "seven trillion, nine hundred forty billion, one hundred sixty-one million, five hundred seventy-three thousand, two hundred sixty-one".