61671000533 has 2 divisors, whose sum is σ = 61671000534. Its totient is φ = 61671000532.

The previous prime is 61671000449. The next prime is 61671000541. The reversal of 61671000533 is 33500017616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51217573969 + 10453426564 = 226313^2 + 102242^2 .

It is a cyclic number.

It is not a de Polignac number, because 61671000533 - 2⁸ = 61671000277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61671000533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61671000233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30835500266 + 30835500267.

It is an arithmetic number, because the mean of its divisors is an integer number (30835500267).

Almost surely, 2^61671000533 is an apocalyptic number.

It is an amenable number.

61671000533 is a deficient number, since it is larger than the sum of its proper divisors (1).

61671000533 is an equidigital number, since it uses as much as digits as its factorization.

61671000533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 61671000533 in words is "sixty-one billion, six hundred seventy-one million, five hundred thirty-three", and thus it is an aban number.