77156146 has 8 divisors (see below), whose sum is σ = 115813404. Its totient is φ = 38551680.

The previous prime is 77156143. The next prime is 77156173. The reversal of 77156146 is 64165177.

It can be written as a sum of positive squares in 2 ways, for example, as 59892121 + 17264025 = 7739^2 + 4155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77156141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9315 + ... + 15526.

Almost surely, 2^77156146 is an apocalyptic number.

77156146 is a deficient number, since it is larger than the sum of its proper divisors (38657258).

77156146 is a wasteful number, since it uses less digits than its factorization.

77156146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26396.

The product of its digits is 35280, while the sum is 37.

The square root of 77156146 is about 8783.8571254319. The cubic root of 77156146 is about 425.7194660164.

It can be divided in two parts, 7715 and 6146, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 77156146 in words is "seventy-seven million, one hundred fifty-six thousand, one hundred forty-six".