73778127961 has 8 divisors (see below), whose sum is σ = 74374882400. Its totient is φ = 73182316320.

The previous prime is 73778127947. The next prime is 73778128007. The reversal of 73778127961 is 16972187737.

It is a happy number.

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 73778127961 - 2²⁷ = 73643910233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73778127896 and 73778127905.

It is not an unprimeable number, because it can be changed into a prime (73778122961) 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, 78135 + ... + 391996.

It is an arithmetic number, because the mean of its divisors is an integer number (9296860300).

Almost surely, 2^73778127961 is an apocalyptic number.

It is an amenable number.

73778127961 is a deficient number, since it is larger than the sum of its proper divisors (596754439).

73778127961 is a wasteful number, since it uses less digits than its factorization.

73778127961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471399.

The product of its digits is 6223392, while the sum is 58.

The spelling of 73778127961 in words is "seventy-three billion, seven hundred seventy-eight million, one hundred twenty-seven thousand, nine hundred sixty-one".