39421705401 has 45 divisors (see below), whose sum is σ = 63805209501. Its totient is φ = 24245215488.

The previous prime is 39421705373. The next prime is 39421705409. The reversal of 39421705401 is 10450712493.

The square root of 39421705401 is 198549.

It is a perfect power (a square), and thus also a powerful number.

39421705401 is a `hidden beast` number, since 3 + 9 + 42 + 1 + 70 + 540 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1560329001 + 37861376400 = 39501^2 + 194580^2 .

It is not a de Polignac number, because 39421705401 - 2¹³ = 39421697209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39421705409) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 23229385 + ... + 23231081.

Almost surely, 2^39421705401 is an apocalyptic number.

39421705401 is the 198549-th square number.

39421705401 is the 99275-th centered octagonal number.

It is an amenable number.

39421705401 is a deficient number, since it is larger than the sum of its proper divisors (24383504100).

39421705401 is an frugal number, since it uses more digits than its factorization.

39421705401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Multiplying 39421705401 by its sum of digits (36), we get a square (1419181394436 = 1191294²).

The spelling of 39421705401 in words is "thirty-nine billion, four hundred twenty-one million, seven hundred five thousand, four hundred one".