31827779458 has 4 divisors (see below), whose sum is σ = 47741669190. Its totient is φ = 15913889728.

The previous prime is 31827779449. The next prime is 31827779461. The reversal of 31827779458 is 85497772813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30379444209 + 1448335249 = 174297^2 + 38057^2 .

It is a super-3 number, since 3×31827779458³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31827779396 and 31827779405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7956944863 + ... + 7956944866.

Almost surely, 2^31827779458 is an apocalyptic number.

31827779458 is a deficient number, since it is larger than the sum of its proper divisors (15913889732).

31827779458 is a wasteful number, since it uses less digits than its factorization.

31827779458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15913889731.

The product of its digits is 23708160, while the sum is 61.

The spelling of 31827779458 in words is "thirty-one billion, eight hundred twenty-seven million, seven hundred seventy-nine thousand, four hundred fifty-eight".