1612631247978 has 128 divisors (see below), whose sum is σ = 3494795673600. Its totient is φ = 494622912960.

The previous prime is 1612631247977. The next prime is 1612631248031. The reversal of 1612631247978 is 8797421362161.

It is not an unprimeable number, because it can be changed into a prime (1612631247977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1152702123 + ... + 1152703521.

It is an arithmetic number, because the mean of its divisors is an integer number (27303091200).

Almost surely, 2^{1612631247978} is an apocalyptic number.

1612631247978 is an abundant number, since it is smaller than the sum of its proper divisors (1882164425622).

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

1612631247978 is a wasteful number, since it uses less digits than its factorization.

1612631247978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872.

The product of its digits is 6096384, while the sum is 57.

The spelling of 1612631247978 in words is "one trillion, six hundred twelve billion, six hundred thirty-one million, two hundred forty-seven thousand, nine hundred seventy-eight".