77956142 has 16 divisors (see below), whose sum is σ = 127710000. Its totient is φ = 35394240.

The previous prime is 77956141. The next prime is 77956159. The reversal of 77956142 is 24165977.

It is a self number, because there is not a number n which added to its sum of digits gives 77956142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77956141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26984 + ... + 29732.

It is an arithmetic number, because the mean of its divisors is an integer number (7981875).

Almost surely, 2^77956142 is an apocalyptic number.

77956142 is a deficient number, since it is larger than the sum of its proper divisors (49753858).

77956142 is a wasteful number, since it uses less digits than its factorization.

77956142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051.

The product of its digits is 105840, while the sum is 41.

The square root of 77956142 is about 8829.2775468891. The cubic root of 77956142 is about 427.1857718461.

The spelling of 77956142 in words is "seventy-seven million, nine hundred fifty-six thousand, one hundred forty-two".