77251673416 has 8 divisors (see below), whose sum is σ = 144846887670. Its totient is φ = 38625836704.

The previous prime is 77251673381. The next prime is 77251673489. The reversal of 77251673416 is 61437615277.

It can be written as a sum of positive squares in only one way, i.e., 52491392100 + 24760281316 = 229110^2 + 157354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×77251673416² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77251673416.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828229581 + ... + 4828229596.

Almost surely, 2^77251673416 is an apocalyptic number.

It is an amenable number.

77251673416 is a deficient number, since it is larger than the sum of its proper divisors (67595214254).

77251673416 is a wasteful number, since it uses less digits than its factorization.

77251673416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656459183 (or 9656459179 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

The spelling of 77251673416 in words is "seventy-seven billion, two hundred fifty-one million, six hundred seventy-three thousand, four hundred sixteen".