61384164487 has 16 divisors (see below), whose sum is σ = 63801568512. Its totient is φ = 59014549440.

The previous prime is 61384164461. The next prime is 61384164497. The reversal of 61384164487 is 78446148316.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61384164487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61384164497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867408 + ... + 1899994.

It is an arithmetic number, because the mean of its divisors is an integer number (3987598032).

Almost surely, 2^61384164487 is an apocalyptic number.

61384164487 is a deficient number, since it is larger than the sum of its proper divisors (2417404025).

61384164487 is a wasteful number, since it uses less digits than its factorization.

61384164487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33318.

The product of its digits is 3096576, while the sum is 52.

The spelling of 61384164487 in words is "sixty-one billion, three hundred eighty-four million, one hundred sixty-four thousand, four hundred eighty-seven".