61573004671 has 2 divisors, whose sum is σ = 61573004672. Its totient is φ = 61573004670.

The previous prime is 61573004629. The next prime is 61573004677. The reversal of 61573004671 is 17640037516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61573004671 - 2¹³ = 61572996479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61573004677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30786502335 + 30786502336.

It is an arithmetic number, because the mean of its divisors is an integer number (30786502336).

Almost surely, 2^61573004671 is an apocalyptic number.

61573004671 is a deficient number, since it is larger than the sum of its proper divisors (1).

61573004671 is an equidigital number, since it uses as much as digits as its factorization.

61573004671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 61573004671 in words is "sixty-one billion, five hundred seventy-three million, four thousand, six hundred seventy-one".