77543351952 has 160 divisors (see below), whose sum is σ = 226689598080. Its totient is φ = 22625218560.

The previous prime is 77543351933. The next prime is 77543351957. The reversal of 77543351952 is 25915334577.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77543351895 and 77543351904.

It is not an unprimeable number, because it can be changed into a prime (77543351957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5704588 + ... + 5718164.

It is an arithmetic number, because the mean of its divisors is an integer number (1416809988).

Almost surely, 2^77543351952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77543351952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113344799040).

77543351952 is an abundant number, since it is smaller than the sum of its proper divisors (149146246128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77543351952 is a wasteful number, since it uses less digits than its factorization.

77543351952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001 (or 13995 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 51.

The spelling of 77543351952 in words is "seventy-seven billion, five hundred forty-three million, three hundred fifty-one thousand, nine hundred fifty-two".