42496678972779 has 4 divisors (see below), whose sum is σ = 56662238630376. Its totient is φ = 28331119315184.

The previous prime is 42496678972723. The next prime is 42496678972789. The reversal of 42496678972779 is 97727987669424.

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

It is a cyclic number.

It is not a de Polignac number, because 42496678972779 - 2⁸ = 42496678972523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42496678972695 and 42496678972704.

It is not an unprimeable number, because it can be changed into a prime (42496678972789) 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, 7082779828794 + ... + 7082779828799.

It is an arithmetic number, because the mean of its divisors is an integer number (14165559657594).

Almost surely, 2^{42496678972779} is an apocalyptic number.

42496678972779 is a deficient number, since it is larger than the sum of its proper divisors (14165559657597).

42496678972779 is a wasteful number, since it uses less digits than its factorization.

42496678972779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14165559657596.

The product of its digits is 32262064128, while the sum is 87.

The spelling of 42496678972779 in words is "forty-two trillion, four hundred ninety-six billion, six hundred seventy-eight million, nine hundred seventy-two thousand, seven hundred seventy-nine".