77956671652 has 6 divisors (see below), whose sum is σ = 136424175398. Its totient is φ = 38978335824.

The previous prime is 77956671649. The next prime is 77956671713. The reversal of 77956671652 is 25617665977.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74198491236 + 3758180416 = 272394^2 + 61304^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9744583953 + ... + 9744583960.

Almost surely, 2^77956671652 is an apocalyptic number.

It is an amenable number.

77956671652 is a deficient number, since it is larger than the sum of its proper divisors (58467503746).

77956671652 is a wasteful number, since it uses less digits than its factorization.

77956671652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19489167917 (or 19489167915 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 61.

The spelling of 77956671652 in words is "seventy-seven billion, nine hundred fifty-six million, six hundred seventy-one thousand, six hundred fifty-two".