672628556540 has 12 divisors (see below), whose sum is σ = 1412519968776. Its totient is φ = 269051422608.

The previous prime is 672628556533. The next prime is 672628556609. The reversal of 672628556540 is 45655826276.

It is a happy number.

It is a congruent 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, 16815713894 + ... + 16815713933.

It is an arithmetic number, because the mean of its divisors is an integer number (117709997398).

Almost surely, 2^672628556540 is an apocalyptic number.

It is an amenable number.

672628556540 is an abundant number, since it is smaller than the sum of its proper divisors (739891412236).

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

672628556540 is a wasteful number, since it uses less digits than its factorization.

672628556540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33631427836 (or 33631427834 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 56.

The spelling of 672628556540 in words is "six hundred seventy-two billion, six hundred twenty-eight million, five hundred fifty-six thousand, five hundred forty".