61501006613 has 2 divisors, whose sum is σ = 61501006614. Its totient is φ = 61501006612.

The previous prime is 61501006549. The next prime is 61501006657. The reversal of 61501006613 is 31660010516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30926036164 + 30574970449 = 175858^2 + 174857^2 .

It is a cyclic number.

It is not a de Polignac number, because 61501006613 - 2⁶ = 61501006549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61501002613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750503306 + 30750503307.

It is an arithmetic number, because the mean of its divisors is an integer number (30750503307).

Almost surely, 2^61501006613 is an apocalyptic number.

It is an amenable number.

61501006613 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501006613 is an equidigital number, since it uses as much as digits as its factorization.

61501006613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 61501006613 in words is "sixty-one billion, five hundred one million, six thousand, six hundred thirteen".