77251012 has 24 divisors (see below), whose sum is σ = 140900760. Its totient is φ = 37013760.

The previous prime is 77251007. The next prime is 77251037. The reversal of 77251012 is 21015277.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31877316 + 45373696 = 5646^2 + 6736^2 .

It is an unprimeable number.

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, 13462 + ... + 18322.

It is an arithmetic number, because the mean of its divisors is an integer number (5870865).

Almost surely, 2^77251012 is an apocalyptic number.

It is an amenable number.

77251012 is a deficient number, since it is larger than the sum of its proper divisors (63649748).

77251012 is a wasteful number, since it uses less digits than its factorization.

77251012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031 (or 5029 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 77251012 is about 8789.2554861035. The cubic root of 77251012 is about 425.8938732160.

Adding to 77251012 its reverse (21015277), we get a palindrome (98266289).

The spelling of 77251012 in words is "seventy-seven million, two hundred fifty-one thousand, twelve".