3661561154 has 8 divisors (see below), whose sum is σ = 5504854080. Its totient is φ = 1826609796.

The previous prime is 3661561151. The next prime is 3661561157. The reversal of 3661561154 is 4511651663.

It is an interprime number because it is at equal distance from previous prime (3661561151) and next prime (3661561157).

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

It is not an unprimeable number, because it can be changed into a prime (3661561151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2084294 + ... + 2086049.

It is an arithmetic number, because the mean of its divisors is an integer number (688106760).

Almost surely, 2^3661561154 is an apocalyptic number.

3661561154 is a deficient number, since it is larger than the sum of its proper divisors (1843292926).

3661561154 is a wasteful number, since it uses less digits than its factorization.

3661561154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170784.

The product of its digits is 64800, while the sum is 38.

The square root of 3661561154 is about 60510.8350132437. The cubic root of 3661561154 is about 1541.3056271764.

The spelling of 3661561154 in words is "three billion, six hundred sixty-one million, five hundred sixty-one thousand, one hundred fifty-four".