45903551661 has 128 divisors (see below), whose sum is σ = 78911078400. Its totient is φ = 26111808000.

The previous prime is 45903551653. The next prime is 45903551713. The reversal of 45903551661 is 16615530954.

45903551661 is a `hidden beast` number, since 4 + 5 + 90 + 3 + 551 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 45903551661 - 2³ = 45903551653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45903551461) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 104563680 + ... + 104564118.

It is an arithmetic number, because the mean of its divisors is an integer number (616492800).

Almost surely, 2^45903551661 is an apocalyptic number.

45903551661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

45903551661 is a deficient number, since it is larger than the sum of its proper divisors (33007526739).

45903551661 is a wasteful number, since it uses less digits than its factorization.

45903551661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 45903551661 in words is "forty-five billion, nine hundred three million, five hundred fifty-one thousand, six hundred sixty-one".