42531977678 has 16 divisors (see below), whose sum is σ = 64574946576. Its totient is φ = 21007061760.

The previous prime is 42531977671. The next prime is 42531977699. The reversal of 42531977678 is 87677913524.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531977671) 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, 2050238 + ... + 2070878.

It is an arithmetic number, because the mean of its divisors is an integer number (4035934161).

Almost surely, 2^42531977678 is an apocalyptic number.

42531977678 is a deficient number, since it is larger than the sum of its proper divisors (22042968898).

42531977678 is a wasteful number, since it uses less digits than its factorization.

42531977678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33139.

The product of its digits is 17781120, while the sum is 59.

The spelling of 42531977678 in words is "forty-two billion, five hundred thirty-one million, nine hundred seventy-seven thousand, six hundred seventy-eight".