61023178442 has 4 divisors (see below), whose sum is σ = 91534767666. Its totient is φ = 30511589220.

The previous prime is 61023178439. The next prime is 61023178493. The reversal of 61023178442 is 24487132016.

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

It can be written as a sum of positive squares in only one way, i.e., 60280561441 + 742617001 = 245521^2 + 27251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61023178396 and 61023178405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15255794609 + ... + 15255794612.

Almost surely, 2^61023178442 is an apocalyptic number.

61023178442 is a deficient number, since it is larger than the sum of its proper divisors (30511589224).

61023178442 is a wasteful number, since it uses less digits than its factorization.

61023178442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30511589223.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 61023178442 in words is "sixty-one billion, twenty-three million, one hundred seventy-eight thousand, four hundred forty-two".