3400156561 has 2 divisors, whose sum is σ = 3400156562. Its totient is φ = 3400156560.

The previous prime is 3400156523. The next prime is 3400156577. The reversal of 3400156561 is 1656510043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3362260225 + 37896336 = 57985^2 + 6156^2 .

It is a cyclic number.

It is not a de Polignac number, because 3400156561 - 2⁹ = 3400156049 is a prime.

It is a super-2 number, since 2×3400156561² = 23122129278622693442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3400156511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1700078280 + 1700078281.

It is an arithmetic number, because the mean of its divisors is an integer number (1700078281).

Almost surely, 2^3400156561 is an apocalyptic number.

It is an amenable number.

3400156561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3400156561 is an equidigital number, since it uses as much as digits as its factorization.

3400156561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 3400156561 is about 58310.8614324981. The cubic root of 3400156561 is about 1503.7176762360.

The spelling of 3400156561 in words is "three billion, four hundred million, one hundred fifty-six thousand, five hundred sixty-one".