1901238668945 has 32 divisors (see below), whose sum is σ = 2851763016960. Its totient is φ = 1182140893440.

The previous prime is 1901238668911. The next prime is 1901238668947. The reversal of 1901238668945 is 5498668321091.

It is not a de Polignac number, because 1901238668945 - 2¹² = 1901238664849 is a prime.

It is a super-2 number, since 2×1901238668945² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901238668947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6197642 + ... + 6497171.

It is an arithmetic number, because the mean of its divisors is an integer number (89117594280).

Almost surely, 2^{1901238668945} is an apocalyptic number.

It is an amenable number.

1901238668945 is a deficient number, since it is larger than the sum of its proper divisors (950524348015).

1901238668945 is a wasteful number, since it uses less digits than its factorization.

1901238668945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12695225.

The product of its (nonzero) digits is 22394880, while the sum is 62.

The spelling of 1901238668945 in words is "one trillion, nine hundred one billion, two hundred thirty-eight million, six hundred sixty-eight thousand, nine hundred forty-five".