83372355440 has 80 divisors (see below), whose sum is σ = 212525683200. Its totient is φ = 30164808960.

The previous prime is 83372355421. The next prime is 83372355449. The reversal of 83372355440 is 4455327338.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×83372355440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 83372355391 and 83372355400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83372355449) 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, 62924 + ... + 413163.

It is an arithmetic number, because the mean of its divisors is an integer number (2656571040).

Almost surely, 2^83372355440 is an apocalyptic number.

83372355440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83372355440 is an abundant number, since it is smaller than the sum of its proper divisors (129153327760).

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

83372355440 is a wasteful number, since it uses less digits than its factorization.

83372355440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476310 (or 476304 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 83372355440 in words is "eighty-three billion, three hundred seventy-two million, three hundred fifty-five thousand, four hundred forty".