45878181993 has 48 divisors (see below), whose sum is σ = 75999446016. Its totient is φ = 26124910560.

The previous prime is 45878181991. The next prime is 45878182019. The reversal of 45878181993 is 39918187854.

45878181993 is a `hidden beast` number, since 458 + 7 + 81 + 8 + 19 + 93 = 666.

It is not a de Polignac number, because 45878181993 - 2¹ = 45878181991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 45878181993.

It is not an unprimeable number, because it can be changed into a prime (45878181991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35101246 + ... + 35102552.

It is an arithmetic number, because the mean of its divisors is an integer number (1583321792).

Almost surely, 2^45878181993 is an apocalyptic number.

It is an amenable number.

45878181993 is a deficient number, since it is larger than the sum of its proper divisors (30121264023).

45878181993 is a wasteful number, since it uses less digits than its factorization.

45878181993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834 (or 2831 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The spelling of 45878181993 in words is "forty-five billion, eight hundred seventy-eight million, one hundred eighty-one thousand, nine hundred ninety-three".