38720801556558 has 40 divisors (see below), whose sum is σ = 94650848253720. Its totient is φ = 11733576228720.

The previous prime is 38720801556557. The next prime is 38720801556559. The reversal of 38720801556558 is 85565510802783.

It is a happy number.

38720801556558 is a `hidden beast` number, since 3 + 8 + 7 + 2 + 0 + 8 + 0 + 15 + 565 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (38720801556557) and next prime (38720801556559).

It is a junction number, because it is equal to n+sod(n) for n = 38720801556495 and 38720801556504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38720801556557) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10864420653 + ... + 10864424216.

It is an arithmetic number, because the mean of its divisors is an integer number (2366271206343).

Almost surely, 2^{38720801556558} is an apocalyptic number.

38720801556558 is an abundant number, since it is smaller than the sum of its proper divisors (55930046697162).

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

38720801556558 is a wasteful number, since it uses less digits than its factorization.

38720801556558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728844894 (or 21728844885 counting only the distinct ones).

The product of its (nonzero) digits is 80640000, while the sum is 63.

The spelling of 38720801556558 in words is "thirty-eight trillion, seven hundred twenty billion, eight hundred one million, five hundred fifty-six thousand, five hundred fifty-eight".