38578763661 has 16 divisors (see below), whose sum is σ = 51989106624. Its totient is φ = 25444007424.

The previous prime is 38578763621. The next prime is 38578763677. The reversal of 38578763661 is 16636787583.

It is not a de Polignac number, because 38578763661 - 2⁹ = 38578763149 is a prime.

It is a super-2 number, since 2×38578763661² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38578763595 and 38578763604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38578763611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754246 + ... + 803768.

It is an arithmetic number, because the mean of its divisors is an integer number (3249319164).

Almost surely, 2^38578763661 is an apocalyptic number.

It is an amenable number.

38578763661 is a deficient number, since it is larger than the sum of its proper divisors (13410342963).

38578763661 is a wasteful number, since it uses less digits than its factorization.

38578763661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52300.

The product of its digits is 30481920, while the sum is 60.

The spelling of 38578763661 in words is "thirty-eight billion, five hundred seventy-eight million, seven hundred sixty-three thousand, six hundred sixty-one".