387668721051 has 12 divisors (see below), whose sum is σ = 569456879160. Its totient is φ = 254065376160.

The previous prime is 387668721049. The next prime is 387668721059. The reversal of 387668721051 is 150127866783.

It is a happy number.

It is not a de Polignac number, because 387668721051 - 2¹ = 387668721049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387668721059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 365035930 + ... + 365036991.

It is an arithmetic number, because the mean of its divisors is an integer number (47454739930).

Almost surely, 2^387668721051 is an apocalyptic number.

387668721051 is a deficient number, since it is larger than the sum of its proper divisors (181788158109).

387668721051 is a wasteful number, since it uses less digits than its factorization.

387668721051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730072986 (or 730072983 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 387668721051 in words is "three hundred eighty-seven billion, six hundred sixty-eight million, seven hundred twenty-one thousand, fifty-one".