61023178443 has 4 divisors (see below), whose sum is σ = 81364237928. Its totient is φ = 40682118960.

The previous prime is 61023178439. The next prime is 61023178493. The reversal of 61023178443 is 34487132016.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61023178443 - 2² = 61023178439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61023178493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10170529738 + ... + 10170529743.

It is an arithmetic number, because the mean of its divisors is an integer number (20341059482).

Almost surely, 2^61023178443 is an apocalyptic number.

61023178443 is a deficient number, since it is larger than the sum of its proper divisors (20341059485).

61023178443 is a wasteful number, since it uses less digits than its factorization.

61023178443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20341059484.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 61023178443 in words is "sixty-one billion, twenty-three million, one hundred seventy-eight thousand, four hundred forty-three".