77578373376 has 720 divisors, whose sum is σ = 283136515200. Its totient is φ = 20623196160.

The previous prime is 77578373347. The next prime is 77578373381. The reversal of 77578373376 is 67337387577.

It is a happy number.

77578373376 is a `hidden beast` number, since 77 + 57 + 83 + 73 + 376 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 367669911 + ... + 367670121.

It is an arithmetic number, because the mean of its divisors is an integer number (393245160).

Almost surely, 2^77578373376 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 77578373376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141568257600).

77578373376 is an abundant number, since it is smaller than the sum of its proper divisors (205558141824).

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

77578373376 is a wasteful number, since it uses less digits than its factorization.

77578373376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 389 counting only the distinct ones).

The product of its digits is 108909360, while the sum is 63.

The spelling of 77578373376 in words is "seventy-seven billion, five hundred seventy-eight million, three hundred seventy-three thousand, three hundred seventy-six".