1618352461 has 4 divisors (see below), whose sum is σ = 1765475424. Its totient is φ = 1471229500.

The previous prime is 1618352459. The next prime is 1618352467. The reversal of 1618352461 is 1642538161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1618352461 - 2¹ = 1618352459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1618352461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618352467) 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, 73561465 + ... + 73561486.

It is an arithmetic number, because the mean of its divisors is an integer number (441368856).

Almost surely, 2^1618352461 is an apocalyptic number.

1618352461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1618352461 is a deficient number, since it is larger than the sum of its proper divisors (147122963).

1618352461 is a wasteful number, since it uses less digits than its factorization.

1618352461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147122962.

The product of its digits is 34560, while the sum is 37.

The square root of 1618352461 is about 40228.7516709132. The cubic root of 1618352461 is about 1174.0620155069.

It can be divided in two parts, 16183 and 52461, that added together give a square (68644 = 262²).

The spelling of 1618352461 in words is "one billion, six hundred eighteen million, three hundred fifty-two thousand, four hundred sixty-one".