7400472785161 has 3 divisors (see below), whose sum is σ = 7400475505543. Its totient is φ = 7400470064780.

The previous prime is 7400472785117. The next prime is 7400472785191. The reversal of 7400472785161 is 1615872740047.

It is a happy number.

The square root of 7400472785161 is 2720381.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 338804320761 + 7061668464400 = 582069^2 + 2657380^2 .

It is not a de Polignac number, because 7400472785161 - 2¹¹ = 7400472783113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7400472785099 and 7400472785108.

It is not an unprimeable number, because it can be changed into a prime (7400472785191) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1360191 + ... + 4080571.

Almost surely, 2^{7400472785161} is an apocalyptic number.

7400472785161 is the 2720381-st square number.

7400472785161 is the 1360191-st centered octagonal number.

It is an amenable number.

7400472785161 is a deficient number, since it is larger than the sum of its proper divisors (2720382).

7400472785161 is an frugal number, since it uses more digits than its factorization.

7400472785161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440762 (or 2720381 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 7400472785161 in words is "seven trillion, four hundred billion, four hundred seventy-two million, seven hundred eighty-five thousand, one hundred sixty-one".