77401586438 has 32 divisors (see below), whose sum is σ = 131689942560. Its totient is φ = 33796860160.

The previous prime is 77401586417. The next prime is 77401586489. The reversal of 77401586438 is 83468510477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77401586438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182231 + ... + 433602.

It is an arithmetic number, because the mean of its divisors is an integer number (4115310705).

Almost surely, 2^77401586438 is an apocalyptic number.

77401586438 is a deficient number, since it is larger than the sum of its proper divisors (54288356122).

77401586438 is a wasteful number, since it uses less digits than its factorization.

77401586438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616072.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 77401586438 in words is "seventy-seven billion, four hundred one million, five hundred eighty-six thousand, four hundred thirty-eight".