49478367645 has 90 divisors (see below), whose sum is σ = 103240682622. Its totient is φ = 22604357664.

The previous prime is 49478367643. The next prime is 49478367649. The reversal of 49478367645 is 54676387494.

It is a happy number.

49478367645 is a `hidden beast` number, since 49 + 478 + 3 + 67 + 64 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39582694116 + 9895673529 = 198954^2 + 99477^2 .

It is not a de Polignac number, because 49478367645 - 2¹ = 49478367643 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49478367643) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 31334466 + ... + 31336044.

Almost surely, 2^49478367645 is an apocalyptic number.

49478367645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49478367645 is an abundant number, since it is smaller than the sum of its proper divisors (53762314977).

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

49478367645 is an frugal number, since it uses more digits than its factorization.

49478367645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189 (or 1594 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

The spelling of 49478367645 in words is "forty-nine billion, four hundred seventy-eight million, three hundred sixty-seven thousand, six hundred forty-five".