461778155 has 16 divisors (see below), whose sum is σ = 560770560. Its totient is φ = 365024352.

The previous prime is 461778131. The next prime is 461778181. The reversal of 461778155 is 551877164.

It is a cyclic number.

It is not a de Polignac number, because 461778155 - 2¹⁶ = 461712619 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156302 + ... + 159228.

It is an arithmetic number, because the mean of its divisors is an integer number (35048160).

Almost surely, 2^461778155 is an apocalyptic number.

461778155 is a deficient number, since it is larger than the sum of its proper divisors (98992405).

461778155 is a wasteful number, since it uses less digits than its factorization.

461778155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298.

The product of its digits is 235200, while the sum is 44.

The square root of 461778155 is about 21489.0240588073. The cubic root of 461778155 is about 772.9376482059.

Subtracting 461778155 from its reverse (551877164), we obtain a palindrome (90099009).

The spelling of 461778155 in words is "four hundred sixty-one million, seven hundred seventy-eight thousand, one hundred fifty-five".