61504116893 has 16 divisors (see below), whose sum is σ = 67385591280. Its totient is φ = 55875219456.

The previous prime is 61504116887. The next prime is 61504116899. The reversal of 61504116893 is 39861140516.

It is an interprime number because it is at equal distance from previous prime (61504116887) and next prime (61504116899).

It can be written as a sum of positive squares in 8 ways, for example, as 632371609 + 60871745284 = 25147^2 + 246722^2 .

It is a cyclic number.

It is not a de Polignac number, because 61504116893 - 2⁶ = 61504116829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61504116899) 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, 2103905 + ... + 2132937.

It is an arithmetic number, because the mean of its divisors is an integer number (4211599455).

Almost surely, 2^61504116893 is an apocalyptic number.

It is an amenable number.

61504116893 is a deficient number, since it is larger than the sum of its proper divisors (5881474387).

61504116893 is a wasteful number, since it uses less digits than its factorization.

61504116893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33376.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 61504116893 in words is "sixty-one billion, five hundred four million, one hundred sixteen thousand, eight hundred ninety-three".