61019773871 has 8 divisors (see below), whose sum is σ = 73839054240. Its totient is φ = 49226035968.

The previous prime is 61019773781. The next prime is 61019773981. The reversal of 61019773871 is 17837791016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61019773871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61019775871) 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 7 ways as a sum of consecutive naturals, for example, 256385486 + ... + 256385723.

It is an arithmetic number, because the mean of its divisors is an integer number (9229881780).

Almost surely, 2^61019773871 is an apocalyptic number.

61019773871 is a deficient number, since it is larger than the sum of its proper divisors (12819280369).

61019773871 is a wasteful number, since it uses less digits than its factorization.

61019773871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512771233.

The product of its (nonzero) digits is 444528, while the sum is 50.

The spelling of 61019773871 in words is "sixty-one billion, nineteen million, seven hundred seventy-three thousand, eight hundred seventy-one".