611001643 has 16 divisors (see below), whose sum is σ = 710208000. Its totient is φ = 514844352.

The previous prime is 611001631. The next prime is 611001653. The reversal of 611001643 is 346100116.

It is a happy number.

It is not a de Polignac number, because 611001643 - 2¹³ = 610993451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611001653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108778 + ... + 114256.

It is an arithmetic number, because the mean of its divisors is an integer number (44388000).

Almost surely, 2^611001643 is an apocalyptic number.

611001643 is a deficient number, since it is larger than the sum of its proper divisors (99206357).

611001643 is a wasteful number, since it uses less digits than its factorization.

611001643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 611001643 is about 24718.4474229269. The cubic root of 611001643 is about 848.5565550160.

Adding to 611001643 its reverse (346100116), we get a palindrome (957101759).

The spelling of 611001643 in words is "six hundred eleven million, one thousand, six hundred forty-three".