3457684631621 has 8 divisors (see below), whose sum is σ = 3778295844288. Its totient is φ = 3138119460000.

The previous prime is 3457684631581. The next prime is 3457684631647. The reversal of 3457684631621 is 1261364867543.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3457684631621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3457684531621) 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, 261503345 + ... + 261516566.

It is an arithmetic number, because the mean of its divisors is an integer number (472286980536).

Almost surely, 2^{3457684631621} is an apocalyptic number.

It is an amenable number.

3457684631621 is a deficient number, since it is larger than the sum of its proper divisors (320611212667).

3457684631621 is a wasteful number, since it uses less digits than its factorization.

3457684631621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523020523.

The product of its digits is 17418240, while the sum is 56.

The spelling of 3457684631621 in words is "three trillion, four hundred fifty-seven billion, six hundred eighty-four million, six hundred thirty-one thousand, six hundred twenty-one".