61605514151 has 2 divisors, whose sum is σ = 61605514152. Its totient is φ = 61605514150.

The previous prime is 61605514129. The next prime is 61605514171. The reversal of 61605514151 is 15141550616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61605514151 is a prime.

It is a super-2 number, since 2×61605514151² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61605514171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802757075 + 30802757076.

It is an arithmetic number, because the mean of its divisors is an integer number (30802757076).

Almost surely, 2^61605514151 is an apocalyptic number.

61605514151 is a deficient number, since it is larger than the sum of its proper divisors (1).

61605514151 is an equidigital number, since it uses as much as digits as its factorization.

61605514151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 61605514151 in words is "sixty-one billion, six hundred five million, five hundred fourteen thousand, one hundred fifty-one".