3996621954501 has 64 divisors (see below), whose sum is σ = 5920728569856. Its totient is φ = 2377893024000.

The previous prime is 3996621954487. The next prime is 3996621954509. The reversal of 3996621954501 is 1054591266993.

It is not a de Polignac number, because 3996621954501 - 2⁵ = 3996621954469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996621954509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254830006 + ... + 254845688.

It is an arithmetic number, because the mean of its divisors is an integer number (92511383904).

Almost surely, 2^{3996621954501} is an apocalyptic number.

It is an amenable number.

3996621954501 is a deficient number, since it is larger than the sum of its proper divisors (1924106615355).

3996621954501 is a wasteful number, since it uses less digits than its factorization.

3996621954501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16442.

The product of its (nonzero) digits is 15746400, while the sum is 60.

The spelling of 3996621954501 in words is "three trillion, nine hundred ninety-six billion, six hundred twenty-one million, nine hundred fifty-four thousand, five hundred one".