77401135446 has 36 divisors (see below), whose sum is σ = 157851837108. Its totient is φ = 25301766672.

The previous prime is 77401135429. The next prime is 77401135481. The reversal of 77401135446 is 64453110477.

It is a junction number, because it is equal to n+sod(n) for n = 77401135398 and 77401135407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36117051 + ... + 36119193.

It is an arithmetic number, because the mean of its divisors is an integer number (4384773253).

Almost surely, 2^77401135446 is an apocalyptic number.

77401135446 is an abundant number, since it is smaller than the sum of its proper divisors (80450701662).

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

77401135446 is an frugal number, since it uses more digits than its factorization.

77401135446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397 (or 2201 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 77401135446 in words is "seventy-seven billion, four hundred one million, one hundred thirty-five thousand, four hundred forty-six".