77748752152 has 8 divisors (see below), whose sum is σ = 145778910300. Its totient is φ = 38874376072.

The previous prime is 77748752129. The next prime is 77748752161. The reversal of 77748752152 is 25125784777.

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

It is a super-2 number, since 2×77748752152² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77748752093 and 77748752102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4859297002 + ... + 4859297017.

Almost surely, 2^77748752152 is an apocalyptic number.

It is an amenable number.

77748752152 is a deficient number, since it is larger than the sum of its proper divisors (68030158148).

77748752152 is a wasteful number, since it uses less digits than its factorization.

77748752152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9718594025 (or 9718594021 counting only the distinct ones).

The product of its digits is 7683200, while the sum is 55.

The spelling of 77748752152 in words is "seventy-seven billion, seven hundred forty-eight million, seven hundred fifty-two thousand, one hundred fifty-two".