5401870261 has 2 divisors, whose sum is σ = 5401870262. Its totient is φ = 5401870260.

The previous prime is 5401870211. The next prime is 5401870277. The reversal of 5401870261 is 1620781045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2915352036 + 2486518225 = 53994^2 + 49865^2 .

It is a cyclic number.

It is not a de Polignac number, because 5401870261 - 2⁹ = 5401869749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5401870211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2700935130 + 2700935131.

It is an arithmetic number, because the mean of its divisors is an integer number (2700935131).

Almost surely, 2^5401870261 is an apocalyptic number.

It is an amenable number.

5401870261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5401870261 is an equidigital number, since it uses as much as digits as its factorization.

5401870261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 5401870261 is about 73497.4166960989. The cubic root of 5401870261 is about 1754.6131631170.

The spelling of 5401870261 in words is "five billion, four hundred one million, eight hundred seventy thousand, two hundred sixty-one".