65401122501 has 48 divisors (see below), whose sum is σ = 117512216640. Its totient is φ = 34435791360.

The previous prime is 65401122481. The next prime is 65401122503. The reversal of 65401122501 is 10522110456.

65401122501 is a `hidden beast` number, since 6 + 5 + 40 + 112 + 2 + 501 = 666.

It is not a de Polignac number, because 65401122501 - 2¹⁹ = 65400598213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65401122503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1472731 + ... + 1516488.

It is an arithmetic number, because the mean of its divisors is an integer number (2448171180).

Almost surely, 2^65401122501 is an apocalyptic number.

It is an amenable number.

65401122501 is a deficient number, since it is larger than the sum of its proper divisors (52111094139).

65401122501 is a wasteful number, since it uses less digits than its factorization.

65401122501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989266 (or 2989263 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 65401122501 its reverse (10522110456), we get a palindrome (75923232957).

The spelling of 65401122501 in words is "sixty-five billion, four hundred one million, one hundred twenty-two thousand, five hundred one".