1491316078 has 12 divisors (see below), whose sum is σ = 2602194552. Its totient is φ = 639135420.

The previous prime is 1491316069. The next prime is 1491316081. The reversal of 1491316078 is 8706131941.

It is a self number, because there is not a number n which added to its sum of digits gives 1491316078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7608658 + ... + 7608853.

It is an arithmetic number, because the mean of its divisors is an integer number (216849546).

Almost surely, 2^1491316078 is an apocalyptic number.

1491316078 is a deficient number, since it is larger than the sum of its proper divisors (1110878474).

1491316078 is a wasteful number, since it uses less digits than its factorization.

1491316078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15217527 (or 15217520 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1491316078 is about 38617.5617821737. The cubic root of 1491316078 is about 1142.5009416365.

The spelling of 1491316078 in words is "one billion, four hundred ninety-one million, three hundred sixteen thousand, seventy-eight".