83478723549 has 16 divisors (see below), whose sum is σ = 119925103872. Its totient is φ = 51346571328.

The previous prime is 83478723511. The next prime is 83478723557. The reversal of 83478723549 is 94532787438.

It is a happy number.

It is not a de Polignac number, because 83478723549 - 2⁹ = 83478723037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83478723492 and 83478723501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83478723599) 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, 438322 + ... + 599235.

It is an arithmetic number, because the mean of its divisors is an integer number (7495318992).

Almost surely, 2^83478723549 is an apocalyptic number.

It is an amenable number.

83478723549 is a deficient number, since it is larger than the sum of its proper divisors (36446380323).

83478723549 is a wasteful number, since it uses less digits than its factorization.

83478723549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039636.

The product of its digits is 40642560, while the sum is 60.

The spelling of 83478723549 in words is "eighty-three billion, four hundred seventy-eight million, seven hundred twenty-three thousand, five hundred forty-nine".