77000132440 has 128 divisors (see below), whose sum is σ = 222968401920. Its totient is φ = 23225817600.

The previous prime is 77000132423. The next prime is 77000132441. The reversal of 77000132440 is 4423100077.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 77000132399 and 77000132408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77000132441) 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, 307747 + ... + 498706.

It is an arithmetic number, because the mean of its divisors is an integer number (1741940640).

Almost surely, 2^77000132440 is an apocalyptic number.

77000132440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77000132440 is an abundant number, since it is smaller than the sum of its proper divisors (145968269480).

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

77000132440 is a wasteful number, since it uses less digits than its factorization.

77000132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806513 (or 806509 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The spelling of 77000132440 in words is "seventy-seven billion, one hundred thirty-two thousand, four hundred forty".