31368781446 has 16 divisors (see below), whose sum is σ = 66428007984. Its totient is φ = 9841186304.

The previous prime is 31368781417. The next prime is 31368781447. The reversal of 31368781446 is 64418786313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31368781447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153768435 + ... + 153768638.

It is an arithmetic number, because the mean of its divisors is an integer number (4151750499).

Almost surely, 2^31368781446 is an apocalyptic number.

31368781446 is an abundant number, since it is smaller than the sum of its proper divisors (35059226538).

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

31368781446 is a wasteful number, since it uses less digits than its factorization.

31368781446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307537095.

The product of its digits is 2322432, while the sum is 51.

The spelling of 31368781446 in words is "thirty-one billion, three hundred sixty-eight million, seven hundred eighty-one thousand, four hundred forty-six".