77811341040 has 120 divisors (see below), whose sum is σ = 270994873968. Its totient is φ = 20749685760.

The previous prime is 77811341021. The next prime is 77811341123. The reversal of 77811341040 is 4014311877.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 77811340986 and 77811341004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1981881 + ... + 2020760.

Almost surely, 2^77811341040 is an apocalyptic number.

It is an amenable number.

77811341040 is an abundant number, since it is smaller than the sum of its proper divisors (193183532928).

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

77811341040 is a wasteful number, since it uses less digits than its factorization.

77811341040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002669 (or 4002651 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 77811341040 in words is "seventy-seven billion, eight hundred eleven million, three hundred forty-one thousand, forty".