308891649494 has 8 divisors (see below), whose sum is σ = 463343278968. Its totient is φ = 154443889840.

The previous prime is 308891649487. The next prime is 308891649553. The reversal of 308891649494 is 494946198803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×308891649494² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 308891649494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758912 + ... + 1092579.

It is an arithmetic number, because the mean of its divisors is an integer number (57917909871).

Almost surely, 2^308891649494 is an apocalyptic number.

308891649494 is a deficient number, since it is larger than the sum of its proper divisors (154451629474).

308891649494 is a wasteful number, since it uses less digits than its factorization.

308891649494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934910.

The product of its (nonzero) digits is 53747712, while the sum is 65.

The spelling of 308891649494 in words is "three hundred eight billion, eight hundred ninety-one million, six hundred forty-nine thousand, four hundred ninety-four".