61540711 has 2 divisors, whose sum is σ = 61540712. Its totient is φ = 61540710.

The previous prime is 61540693. The next prime is 61540733. The reversal of 61540711 is 11704516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61540711 - 2¹⁷ = 61409639 is a prime.

It is a super-2 number, since 2×61540711² = 7574518220771042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61540211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770355 + 30770356.

It is an arithmetic number, because the mean of its divisors is an integer number (30770356).

Almost surely, 2^61540711 is an apocalyptic number.

61540711 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540711 is an equidigital number, since it uses as much as digits as its factorization.

61540711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 61540711 is about 7844.7887798207. The cubic root of 61540711 is about 394.8094172207.

The spelling of 61540711 in words is "sixty-one million, five hundred forty thousand, seven hundred eleven".