64472157321550 has 192 divisors, whose sum is σ = 139777851502080. Its totient is φ = 21888599040000.

The previous prime is 64472157321529. The next prime is 64472157321617. The reversal of 64472157321550 is 5512375127446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 809901750 + ... + 809981350.

It is an arithmetic number, because the mean of its divisors is an integer number (728009643240).

Almost surely, 2^{64472157321550} is an apocalyptic number.

64472157321550 is an abundant number, since it is smaller than the sum of its proper divisors (75305694180530).

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

64472157321550 is a wasteful number, since it uses less digits than its factorization.

64472157321550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81179 (or 81174 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 64472157321550 in words is "sixty-four trillion, four hundred seventy-two billion, one hundred fifty-seven million, three hundred twenty-one thousand, five hundred fifty".