38951262881 has 4 divisors (see below), whose sum is σ = 40207755264. Its totient is φ = 37694770500.

The previous prime is 38951262863. The next prime is 38951262929. The reversal of 38951262881 is 18826215983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18826215983 = 181 ⋅104012243.

It is a cyclic number.

It is not a de Polignac number, because 38951262881 - 2⁶ = 38951262817 is a prime.

It is a super-2 number, since 2×38951262881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38951262781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628246145 + ... + 628246206.

It is an arithmetic number, because the mean of its divisors is an integer number (10051938816).

Almost surely, 2^38951262881 is an apocalyptic number.

38951262881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38951262881 is a deficient number, since it is larger than the sum of its proper divisors (1256492383).

38951262881 is a wasteful number, since it uses less digits than its factorization.

38951262881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256492382.

The product of its digits is 1658880, while the sum is 53.

The spelling of 38951262881 in words is "thirty-eight billion, nine hundred fifty-one million, two hundred sixty-two thousand, eight hundred eighty-one".