72954171954451 has 4 divisors (see below), whose sum is σ = 73877642485600. Its totient is φ = 72030701423304.

The previous prime is 72954171954409. The next prime is 72954171954467. The reversal of 72954171954451 is 15445917145927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72954171954451 - 2²¹ = 72954169857299 is a prime.

It is a super-2 number, since 2×72954171954451² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72154171954451) 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, 461735265456 + ... + 461735265613.

It is an arithmetic number, because the mean of its divisors is an integer number (18469410621400).

Almost surely, 2^{72954171954451} is an apocalyptic number.

72954171954451 is a deficient number, since it is larger than the sum of its proper divisors (923470531149).

72954171954451 is an equidigital number, since it uses as much as digits as its factorization.

72954171954451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923470531148.

The product of its digits is 63504000, while the sum is 64.

The spelling of 72954171954451 in words is "seventy-two trillion, nine hundred fifty-four billion, one hundred seventy-one million, nine hundred fifty-four thousand, four hundred fifty-one".