77126649 has 16 divisors (see below), whose sum is σ = 105591552. Its totient is φ = 50048208.

The previous prime is 77126633. The next prime is 77126653. The reversal of 77126649 is 94662177.

It is not a de Polignac number, because 77126649 - 2⁴ = 77126633 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77126649.

It is not an unprimeable number, because it can be changed into a prime (77126669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43902 + ... + 45624.

It is an arithmetic number, because the mean of its divisors is an integer number (6599472).

Almost surely, 2^77126649 is an apocalyptic number.

It is an amenable number.

77126649 is a deficient number, since it is larger than the sum of its proper divisors (28464903).

77126649 is a wasteful number, since it uses less digits than its factorization.

77126649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its digits is 127008, while the sum is 42.

The square root of 77126649 is about 8782.1779189447. The cubic root of 77126649 is about 425.6652078731.

The spelling of 77126649 in words is "seventy-seven million, one hundred twenty-six thousand, six hundred forty-nine".