77142064 has 20 divisors (see below), whose sum is σ = 151914880. Its totient is φ = 37938240.

The previous prime is 77142061. The next prime is 77142067. The reversal of 77142064 is 46024177.

It is an interprime number because it is at equal distance from previous prime (77142061) and next prime (77142067).

It is not an unprimeable number, because it can be changed into a prime (77142061) 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, 38544 + ... + 40495.

It is an arithmetic number, because the mean of its divisors is an integer number (7595744).

Almost surely, 2^77142064 is an apocalyptic number.

It is an amenable number.

77142064 is a deficient number, since it is larger than the sum of its proper divisors (74772816).

77142064 is a wasteful number, since it uses less digits than its factorization.

77142064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79108 (or 79102 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 77142064 is about 8783.0555047774. The cubic root of 77142064 is about 425.6935646609.

The spelling of 77142064 in words is "seventy-seven million, one hundred forty-two thousand, sixty-four".