61404702617131 has 2 divisors, whose sum is σ = 61404702617132. Its totient is φ = 61404702617130.

The previous prime is 61404702617087. The next prime is 61404702617147. The reversal of 61404702617131 is 13171620740416.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61404702617131 - 2²¹ = 61404700519979 is a prime.

It is a super-2 number, since 2×61404702617131² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61404702717131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30702351308565 + 30702351308566.

It is an arithmetic number, because the mean of its divisors is an integer number (30702351308566).

Almost surely, 2^{61404702617131} is an apocalyptic number.

61404702617131 is a deficient number, since it is larger than the sum of its proper divisors (1).

61404702617131 is an equidigital number, since it uses as much as digits as its factorization.

61404702617131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 61404702617131 in words is "sixty-one trillion, four hundred four billion, seven hundred two million, six hundred seventeen thousand, one hundred thirty-one".