61681175387 has 8 divisors (see below), whose sum is σ = 67035294480. Its totient is φ = 56414115360.

The previous prime is 61681175383. The next prime is 61681175399. The reversal of 61681175387 is 78357118616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61681175387 - 2² = 61681175383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61681175383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21763289 + ... + 21766122.

It is an arithmetic number, because the mean of its divisors is an integer number (8379411810).

Almost surely, 2^61681175387 is an apocalyptic number.

61681175387 is a deficient number, since it is larger than the sum of its proper divisors (5354119093).

61681175387 is a wasteful number, since it uses less digits than its factorization.

61681175387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43529533.

The product of its digits is 1693440, while the sum is 53.

The spelling of 61681175387 in words is "sixty-one billion, six hundred eighty-one million, one hundred seventy-five thousand, three hundred eighty-seven".