2001981392502 has 32 divisors (see below), whose sum is σ = 4927954198272. Its totient is φ = 527995092384.

The previous prime is 2001981392473. The next prime is 2001981392527. The reversal of 2001981392502 is 2052931891002.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1833315748 + ... + 1833316839.

It is an arithmetic number, because the mean of its divisors is an integer number (153998568696).

Almost surely, 2^{2001981392502} is an apocalyptic number.

2001981392502 is an abundant number, since it is smaller than the sum of its proper divisors (2925972805770).

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

2001981392502 is a wasteful number, since it uses less digits than its factorization.

2001981392502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666632612.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 2001981392502 in words is "two trillion, one billion, nine hundred eighty-one million, three hundred ninety-two thousand, five hundred two".