611554042406 has 4 divisors (see below), whose sum is σ = 917331063612. Its totient is φ = 305777021202.

The previous prime is 611554042399. The next prime is 611554042409. The reversal of 611554042406 is 604240455116.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 611554042406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611554042409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152888510600 + ... + 152888510603.

It is an arithmetic number, because the mean of its divisors is an integer number (229332765903).

Almost surely, 2^611554042406 is an apocalyptic number.

611554042406 is a deficient number, since it is larger than the sum of its proper divisors (305777021206).

611554042406 is a wasteful number, since it uses less digits than its factorization.

611554042406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305777021205.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 611554042406 in words is "six hundred eleven billion, five hundred fifty-four million, forty-two thousand, four hundred six".