77481005 has 24 divisors (see below), whose sum is σ = 108708120. Its totient is φ = 52859520.

The previous prime is 77480989. The next prime is 77481013. The reversal of 77481005 is 50018477.

It can be written as a sum of positive squares in 4 ways, for example, as 21799561 + 55681444 = 4669^2 + 7462^2 .

It is not a de Polignac number, because 77481005 - 2⁴ = 77480989 is a prime.

It is a super-2 number, since 2×77481005² = 12006612271620050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55415 + ... + 56795.

It is an arithmetic number, because the mean of its divisors is an integer number (4529505).

Almost surely, 2^77481005 is an apocalyptic number.

It is an amenable number.

77481005 is a deficient number, since it is larger than the sum of its proper divisors (31227115).

77481005 is a wasteful number, since it uses less digits than its factorization.

77481005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 77481005 is about 8802.3295212120. The cubic root of 77481005 is about 426.3161139038.

The spelling of 77481005 in words is "seventy-seven million, four hundred eighty-one thousand, five".