81496077 has 8 divisors (see below), whose sum is σ = 117020064. Its totient is φ = 50151408.

The previous prime is 81496067. The next prime is 81496087. The reversal of 81496077 is 77069418.

It is an interprime number because it is at equal distance from previous prime (81496067) and next prime (81496087).

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

It is not a de Polignac number, because 81496077 - 2⁷ = 81495949 is a prime.

It is a super-2 number, since 2×81496077² = 13283221132779858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81496067) 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, 1044783 + ... + 1044860.

It is an arithmetic number, because the mean of its divisors is an integer number (14627508).

Almost surely, 2^81496077 is an apocalyptic number.

It is an amenable number.

81496077 is a deficient number, since it is larger than the sum of its proper divisors (35523987).

81496077 is a wasteful number, since it uses less digits than its factorization.

81496077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089659.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 81496077 is about 9027.5177651445. The cubic root of 81496077 is about 433.5563663836.

The spelling of 81496077 in words is "eighty-one million, four hundred ninety-six thousand, seventy-seven".