87272726981 has 8 divisors (see below), whose sum is σ = 95208830784. Its totient is φ = 79336993120.

The previous prime is 87272726971. The next prime is 87272727053. The reversal of 87272726981 is 18962727278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-87272726981 is a prime.

It is a super-2 number, since 2×87272726981² (a number of 23 digits) contains 22 as substring.

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 87272726981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87272726971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685001 + ... + 802353.

It is an arithmetic number, because the mean of its divisors is an integer number (11901103848).

Almost surely, 2^87272726981 is an apocalyptic number.

It is an amenable number.

87272726981 is a deficient number, since it is larger than the sum of its proper divisors (7936103803).

87272726981 is a wasteful number, since it uses less digits than its factorization.

87272726981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184971.

The product of its digits is 9483264, while the sum is 59.

The spelling of 87272726981 in words is "eighty-seven billion, two hundred seventy-two million, seven hundred twenty-six thousand, nine hundred eighty-one".