77545554 has 8 divisors (see below), whose sum is σ = 155091120. Its totient is φ = 25848516.

The previous prime is 77545553. The next prime is 77545571. The reversal of 77545554 is 45554577.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

77545554 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (77545553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462124 + ... + 6462135.

It is an arithmetic number, because the mean of its divisors is an integer number (19386390).

Almost surely, 2^77545554 is an apocalyptic number.

77545554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77545554 is a wasteful number, since it uses less digits than its factorization.

77545554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924264.

The product of its digits is 490000, while the sum is 42.

The square root of 77545554 is about 8805.9953440823. The cubic root of 77545554 is about 426.4344682480.

The spelling of 77545554 in words is "seventy-seven million, five hundred forty-five thousand, five hundred fifty-four".