972136521041 has 4 divisors (see below), whose sum is σ = 1111013166912. Its totient is φ = 833259875172.

The previous prime is 972136521023. The next prime is 972136521079. The reversal of 972136521041 is 140125631279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 972136521041 - 2¹⁸ = 972136258897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 972136521041.

It is not an unprimeable number, because it can be changed into a prime (972136521341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69438322925 + ... + 69438322938.

It is an arithmetic number, because the mean of its divisors is an integer number (277753291728).

Almost surely, 2^972136521041 is an apocalyptic number.

It is an amenable number.

972136521041 is a deficient number, since it is larger than the sum of its proper divisors (138876645871).

972136521041 is a wasteful number, since it uses less digits than its factorization.

972136521041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138876645870.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 972136521041 in words is "nine hundred seventy-two billion, one hundred thirty-six million, five hundred twenty-one thousand, forty-one".