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88871257981 = 1139720350643
BaseRepresentation
bin101001011000100100…
…0111100011101111101
322111101120221200011101
41102301020330131331
52424002020223411
6104454335253101
76264212141332
oct1226110743575
9274346850141
1088871257981
1134765565550
121528297a191
1384c401a0ac
14443103a989
1524a22198c1
hex14b123c77d

88871257981 has 8 divisors (see below), whose sum is σ = 97194675744. Its totient is φ = 80588542320.

The previous prime is 88871257961. The next prime is 88871257987. The reversal of 88871257981 is 18975217888.

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

It is not a de Polignac number, because 88871257981 - 29 = 88871257469 is a prime.

It is a super-2 number, since 2×888712579812 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88871257987) 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, 10170955 + ... + 10179688.

It is an arithmetic number, because the mean of its divisors is an integer number (12149334468).

Almost surely, 288871257981 is an apocalyptic number.

It is an amenable number.

88871257981 is a deficient number, since it is larger than the sum of its proper divisors (8323417763).

88871257981 is a wasteful number, since it uses less digits than its factorization.

88871257981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20351051.

The product of its digits is 18063360, while the sum is 64.

The spelling of 88871257981 in words is "eighty-eight billion, eight hundred seventy-one million, two hundred fifty-seven thousand, nine hundred eighty-one".

Divisors: 1 11 397 4367 20350643 223857073 8079205271 88871257981