825537378990 has 32 divisors (see below), whose sum is σ = 1981323501696. Its totient is φ = 220139546400.

The previous prime is 825537378979. The next prime is 825537378997. The reversal of 825537378990 is 99873735528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825537378997) 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, 1860165 + ... + 2260815.

It is an arithmetic number, because the mean of its divisors is an integer number (61916359428).

Almost surely, 2^825537378990 is an apocalyptic number.

825537378990 is an abundant number, since it is smaller than the sum of its proper divisors (1155786122706).

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

825537378990 is a wasteful number, since it uses less digits than its factorization.

825537378990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469344.

The product of its (nonzero) digits is 114307200, while the sum is 66.

The spelling of 825537378990 in words is "eight hundred twenty-five billion, five hundred thirty-seven million, three hundred seventy-eight thousand, nine hundred ninety".