681451495 has 8 divisors (see below), whose sum is σ = 818785584. Its totient is φ = 544465344.

The previous prime is 681451493. The next prime is 681451499. The reversal of 681451495 is 594154186.

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

It is a cyclic number.

It is not a de Polignac number, because 681451495 - 2¹ = 681451493 is a prime.

It is a super-2 number, since 2×681451495² = 928752280075470050, which 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 (681451493) 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, 82654 + ... + 90523.

It is an arithmetic number, because the mean of its divisors is an integer number (102348198).

Almost surely, 2^681451495 is an apocalyptic number.

681451495 is a deficient number, since it is larger than the sum of its proper divisors (137334089).

681451495 is a wasteful number, since it uses less digits than its factorization.

681451495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173969.

The product of its digits is 172800, while the sum is 43.

The square root of 681451495 is about 26104.6259310491. The cubic root of 681451495 is about 879.9911737235.

The spelling of 681451495 in words is "six hundred eighty-one million, four hundred fifty-one thousand, four hundred ninety-five".