61537344511 has 2 divisors, whose sum is σ = 61537344512. Its totient is φ = 61537344510.

The previous prime is 61537344503. The next prime is 61537344559. The reversal of 61537344511 is 11544373516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61537344511 - 2³ = 61537344503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61537344581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30768672255 + 30768672256.

It is an arithmetic number, because the mean of its divisors is an integer number (30768672256).

Almost surely, 2^61537344511 is an apocalyptic number.

61537344511 is a deficient number, since it is larger than the sum of its proper divisors (1).

61537344511 is an equidigital number, since it uses as much as digits as its factorization.

61537344511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The spelling of 61537344511 in words is "sixty-one billion, five hundred thirty-seven million, three hundred forty-four thousand, five hundred eleven".