61438084461 has 24 divisors (see below), whose sum is σ = 95582462976. Its totient is φ = 37803261600.

The previous prime is 61438084457. The next prime is 61438084481. The reversal of 61438084461 is 16448083416.

It is not a de Polignac number, because 61438084461 - 2² = 61438084457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61438084481) 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 in 23 ways as a sum of consecutive naturals, for example, 1041976 + ... + 1099358.

It is an arithmetic number, because the mean of its divisors is an integer number (3982602624).

Almost surely, 2^61438084461 is an apocalyptic number.

It is an amenable number.

61438084461 is a deficient number, since it is larger than the sum of its proper divisors (34144378515).

61438084461 is a wasteful number, since it uses less digits than its factorization.

61438084461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66553 (or 66550 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 61438084461 in words is "sixty-one billion, four hundred thirty-eight million, eighty-four thousand, four hundred sixty-one".