61155671 has 2 divisors, whose sum is σ = 61155672. Its totient is φ = 61155670.

The previous prime is 61155667. The next prime is 61155701. The reversal of 61155671 is 17655116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61155671 - 2² = 61155667 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61155631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30577835 + 30577836.

It is an arithmetic number, because the mean of its divisors is an integer number (30577836).

Almost surely, 2^61155671 is an apocalyptic number.

61155671 is a deficient number, since it is larger than the sum of its proper divisors (1).

61155671 is an equidigital number, since it uses as much as digits as its factorization.

61155671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

The square root of 61155671 is about 7820.2091404258. The cubic root of 61155671 is about 393.9842964014.

The spelling of 61155671 in words is "sixty-one million, one hundred fifty-five thousand, six hundred seventy-one".