38451178551 has 4 divisors (see below), whose sum is σ = 51268238072. Its totient is φ = 25634119032.

The previous prime is 38451178537. The next prime is 38451178559. The reversal of 38451178551 is 15587115483.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 38451178551 - 2²⁷ = 38316960823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38451178551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38451178559) 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, 6408529756 + ... + 6408529761.

It is an arithmetic number, because the mean of its divisors is an integer number (12817059518).

Almost surely, 2^38451178551 is an apocalyptic number.

38451178551 is a deficient number, since it is larger than the sum of its proper divisors (12817059521).

38451178551 is a wasteful number, since it uses less digits than its factorization.

38451178551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12817059520.

The product of its digits is 672000, while the sum is 48.

The spelling of 38451178551 in words is "thirty-eight billion, four hundred fifty-one million, one hundred seventy-eight thousand, five hundred fifty-one".