674239696641 has 81 divisors (see below), whose sum is σ = 1153582508169. Its totient is φ = 378372556800.

The previous prime is 674239696639. The next prime is 674239696679. The reversal of 674239696641 is 146696932476.

674239696641 = 1³ + 2³ + ... + 1281³.

The square root of 674239696641 is 821121.

It is a perfect power (a square), and thus also a powerful number.

674239696641 is a `hidden beast` number, since 67 + 42 + 396 + 96 + 64 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12392365041 + 661847331600 = 111321^2 + 813540^2 .

It is not a de Polignac number, because 674239696641 - 2¹ = 674239696639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (674239696601) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1051855681 + ... + 1051856321.

Almost surely, 2^674239696641 is an apocalyptic number.

674239696641 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

674239696641 is the 821121-st square number.

674239696641 is the 410561-st centered octagonal number.

It is an amenable number.

674239696641 is a deficient number, since it is larger than the sum of its proper divisors (479342811528).

674239696641 is an frugal number, since it uses more digits than its factorization.

674239696641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 712 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 674239696641 in words is "six hundred seventy-four billion, two hundred thirty-nine million, six hundred ninety-six thousand, six hundred forty-one".