1901565666424 has 32 divisors (see below), whose sum is σ = 3753552124800. Its totient is φ = 900630753120.

The previous prime is 1901565666373. The next prime is 1901565666431. The reversal of 1901565666424 is 4246665651091.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475479 + ... + 2007289.

It is an arithmetic number, because the mean of its divisors is an integer number (117298503900).

Almost surely, 2^{1901565666424} is an apocalyptic number.

It is an amenable number.

1901565666424 is a deficient number, since it is larger than the sum of its proper divisors (1851986458376).

1901565666424 is a wasteful number, since it uses less digits than its factorization.

1901565666424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540003 (or 1539999 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 1901565666424 in words is "one trillion, nine hundred one billion, five hundred sixty-five million, six hundred sixty-six thousand, four hundred twenty-four".