1993440362651 has 8 divisors (see below), whose sum is σ = 2112831448704. Its totient is φ = 1874285930880.

The previous prime is 1993440362591. The next prime is 1993440362659. The reversal of 1993440362651 is 1562630443991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993440362651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1993440362593 and 1993440362602.

It is not an unprimeable number, because it can be changed into a prime (1993440362659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59146220 + ... + 59179913.

It is an arithmetic number, because the mean of its divisors is an integer number (264103931088).

Almost surely, 2^{1993440362651} is an apocalyptic number.

1993440362651 is a deficient number, since it is larger than the sum of its proper divisors (119391086053).

1993440362651 is a wasteful number, since it uses less digits than its factorization.

1993440362651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118327141.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 1993440362651 in words is "one trillion, nine hundred ninety-three billion, four hundred forty million, three hundred sixty-two thousand, six hundred fifty-one".