981694450372 has 6 divisors (see below), whose sum is σ = 1717965288158. Its totient is φ = 490847225184.

The previous prime is 981694450357. The next prime is 981694450379. The reversal of 981694450372 is 273054496189.

It can be written as a sum of positive squares in only one way, i.e., 962313912576 + 19380537796 = 980976^2 + 139214^2 .

It is not an unprimeable number, because it can be changed into a prime (981694450379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122711806293 + ... + 122711806300.

It is a 1-persistent number, because it is pandigital, but 2⋅981694450372 = 1963388900744 is not.

Almost surely, 2^981694450372 is an apocalyptic number.

It is an amenable number.

981694450372 is a deficient number, since it is larger than the sum of its proper divisors (736270837786).

981694450372 is a wasteful number, since it uses less digits than its factorization.

981694450372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245423612597 (or 245423612595 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 981694450372 in words is "nine hundred eighty-one billion, six hundred ninety-four million, four hundred fifty thousand, three hundred seventy-two".