613451978397 has 24 divisors (see below), whose sum is σ = 910595784384. Its totient is φ = 397742635584.

The previous prime is 613451978383. The next prime is 613451978401. The reversal of 613451978397 is 793879154316.

613451978397 is a `hidden beast` number, since 6 + 1 + 3 + 451 + 97 + 8 + 3 + 97 = 666.

It is not a de Polignac number, because 613451978397 - 2²² = 613447784093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613451978897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3311433 + ... + 3491774.

It is an arithmetic number, because the mean of its divisors is an integer number (37941491016).

Almost surely, 2^613451978397 is an apocalyptic number.

It is an amenable number.

613451978397 is a deficient number, since it is larger than the sum of its proper divisors (297143805987).

613451978397 is a wasteful number, since it uses less digits than its factorization.

613451978397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803489 (or 6803486 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 613451978397 in words is "six hundred thirteen billion, four hundred fifty-one million, nine hundred seventy-eight thousand, three hundred ninety-seven".