61404702617087 has 2 divisors, whose sum is σ = 61404702617088. Its totient is φ = 61404702617086.

The previous prime is 61404702617053. The next prime is 61404702617131. The reversal of 61404702617087 is 78071620740416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61404702617087 - 2¹⁸ = 61404702354943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61404702610087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30702351308543 + 30702351308544.

It is an arithmetic number, because the mean of its divisors is an integer number (30702351308544).

Almost surely, 2^{61404702617087} is an apocalyptic number.

61404702617087 is a deficient number, since it is larger than the sum of its proper divisors (1).

61404702617087 is an equidigital number, since it uses as much as digits as its factorization.

61404702617087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 61404702617087 in words is "sixty-one trillion, four hundred four billion, seven hundred two million, six hundred seventeen thousand, eighty-seven".