77152863949 has 16 divisors (see below), whose sum is σ = 89576312320. Its totient is φ = 65085171840.

The previous prime is 77152863941. The next prime is 77152864001. The reversal of 77152863949 is 94936825177.

It is a cyclic number.

It is not a de Polignac number, because 77152863949 - 2³ = 77152863941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77152863941) 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, 49782 + ... + 395959.

It is an arithmetic number, because the mean of its divisors is an integer number (5598519520).

Almost surely, 2^77152863949 is an apocalyptic number.

77152863949 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

77152863949 is a deficient number, since it is larger than the sum of its proper divisors (12423448371).

77152863949 is a wasteful number, since it uses less digits than its factorization.

77152863949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446140.

The product of its digits is 22861440, while the sum is 61.

The spelling of 77152863949 in words is "seventy-seven billion, one hundred fifty-two million, eight hundred sixty-three thousand, nine hundred forty-nine".