81763153 has 8 divisors (see below), whose sum is σ = 83498688. Its totient is φ = 80034864.

The previous prime is 81763147. The next prime is 81763159. The reversal of 81763153 is 35136718.

It is an interprime number because it is at equal distance from previous prime (81763147) and next prime (81763159).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81763153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81763159) 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, 25126 + ... + 28192.

It is an arithmetic number, because the mean of its divisors is an integer number (10437336).

Almost surely, 2^81763153 is an apocalyptic number.

It is an amenable number.

81763153 is a deficient number, since it is larger than the sum of its proper divisors (1735535).

81763153 is a wasteful number, since it uses less digits than its factorization.

81763153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623.

The product of its digits is 15120, while the sum is 34.

The square root of 81763153 is about 9042.2979933201. The cubic root of 81763153 is about 434.0294617105.

The spelling of 81763153 in words is "eighty-one million, seven hundred sixty-three thousand, one hundred fifty-three".