611402665451 has 4 divisors (see below), whose sum is σ = 612782807352. Its totient is φ = 610022523552.

The previous prime is 611402665429. The next prime is 611402665459. The reversal of 611402665451 is 154566204116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 611402665451 - 2²² = 611398471147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611402665399 and 611402665408.

It is not an unprimeable number, because it can be changed into a prime (611402665459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690070286 + ... + 690071171.

It is an arithmetic number, because the mean of its divisors is an integer number (153195701838).

Almost surely, 2^611402665451 is an apocalyptic number.

611402665451 is a deficient number, since it is larger than the sum of its proper divisors (1380141901).

611402665451 is a wasteful number, since it uses less digits than its factorization.

611402665451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380141900.

The product of its (nonzero) digits is 172800, while the sum is 41.

Adding to 611402665451 its reverse (154566204116), we get a palindrome (765968869567).

The spelling of 611402665451 in words is "six hundred eleven billion, four hundred two million, six hundred sixty-five thousand, four hundred fifty-one".