6401993941 has 8 divisors (see below), whose sum is σ = 7318100160. Its totient is φ = 5486271648.

The previous prime is 6401993887. The next prime is 6401993951. The reversal of 6401993941 is 1493991046.

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

It is a cyclic number.

It is not a de Polignac number, because 6401993941 - 2¹⁵ = 6401961173 is a prime.

It is a super-2 number, since 2×6401993941² = 81971052841201422962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6401993891 and 6401993900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401993951) 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, 59311 + ... + 127756.

It is an arithmetic number, because the mean of its divisors is an integer number (914762520).

Almost surely, 2^6401993941 is an apocalyptic number.

It is an amenable number.

6401993941 is a deficient number, since it is larger than the sum of its proper divisors (916106219).

6401993941 is a wasteful number, since it uses less digits than its factorization.

6401993941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191963.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 6401993941 is about 80012.4611607467. The cubic root of 6401993941 is about 1856.8283270555.

The spelling of 6401993941 in words is "six billion, four hundred one million, nine hundred ninety-three thousand, nine hundred forty-one".