638676481074 has 16 divisors (see below), whose sum is σ = 1277436237312. Its totient is φ = 212878281168.

The previous prime is 638676481049. The next prime is 638676481097. The reversal of 638676481074 is 470184676836.

It is a happy number.

It is a super-3 number, since 3×638676481074³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638676480999 and 638676481017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3369874 + ... + 3554349.

It is an arithmetic number, because the mean of its divisors is an integer number (79839764832).

Almost surely, 2^638676481074 is an apocalyptic number.

638676481074 is an abundant number, since it is smaller than the sum of its proper divisors (638759756238).

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

638676481074 is a wasteful number, since it uses less digits than its factorization.

638676481074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939601.

The product of its (nonzero) digits is 32514048, while the sum is 60.

The spelling of 638676481074 in words is "six hundred thirty-eight billion, six hundred seventy-six million, four hundred eighty-one thousand, seventy-four".