77616149 has 8 divisors (see below), whose sum is σ = 83657112. Its totient is φ = 71585280.

The previous prime is 77616137. The next prime is 77616173. The reversal of 77616149 is 94161677.

It can be written as a sum of positive squares in 4 ways, for example, as 52900 + 77563249 = 230^2 + 8807^2 .

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

It is not a de Polignac number, because 77616149 - 2¹² = 77612053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77616109) 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, 23309 + ... + 26429.

It is an arithmetic number, because the mean of its divisors is an integer number (10457139).

Almost surely, 2^77616149 is an apocalyptic number.

It is an amenable number.

77616149 is a deficient number, since it is larger than the sum of its proper divisors (6040963).

77616149 is a wasteful number, since it uses less digits than its factorization.

77616149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047.

The product of its digits is 63504, while the sum is 41.

The square root of 77616149 is about 8810.0027809303. The cubic root of 77616149 is about 426.5638331140.

It can be divided in two parts, 776161 and 49, that multiplied together give a square (38031889 = 6167²).

The spelling of 77616149 in words is "seventy-seven million, six hundred sixteen thousand, one hundred forty-nine".