381993264640902 has 32 divisors (see below), whose sum is σ = 804517126997760. Its totient is φ = 120677569040160.

The previous prime is 381993264640877. The next prime is 381993264640913. The reversal of 381993264640902 is 209046462399183.

It is a super-2 number, since 2×381993264640902² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12697540624 + ... + 12697570707.

It is an arithmetic number, because the mean of its divisors is an integer number (25141160218680).

Almost surely, 2^{381993264640902} is an apocalyptic number.

381993264640902 is an abundant number, since it is smaller than the sum of its proper divisors (422523862356858).

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

381993264640902 is a wasteful number, since it uses less digits than its factorization.

381993264640902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25395111468.

The product of its (nonzero) digits is 120932352, while the sum is 66.

The spelling of 381993264640902 in words is "three hundred eighty-one trillion, nine hundred ninety-three billion, two hundred sixty-four million, six hundred forty thousand, nine hundred two".