64780554 has 8 divisors (see below), whose sum is σ = 129561120. Its totient is φ = 21593516.

The previous prime is 64780543. The next prime is 64780561. The reversal of 64780554 is 45508746.

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

64780554 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5398374 + ... + 5398385.

It is an arithmetic number, because the mean of its divisors is an integer number (16195140).

Almost surely, 2^64780554 is an apocalyptic number.

64780554 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.

64780554 is a wasteful number, since it uses less digits than its factorization.

64780554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10796764.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 64780554 is about 8048.6367789831. The cubic root of 64780554 is about 401.6195876556.

The spelling of 64780554 in words is "sixty-four million, seven hundred eighty thousand, five hundred fifty-four".