1616633477 has 4 divisors (see below), whose sum is σ = 1668782976. Its totient is φ = 1564483980.

The previous prime is 1616633471. The next prime is 1616633519. The reversal of 1616633477 is 7743366161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7743366161 = 59929 ⋅129209.

It is a cyclic number.

It is not a de Polignac number, because 1616633477 - 2¹⁶ = 1616567941 is a prime.

It is a super-2 number, since 2×1616633477² = 5227007597914219058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616633471) 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, 26074703 + ... + 26074764.

It is an arithmetic number, because the mean of its divisors is an integer number (417195744).

Almost surely, 2^1616633477 is an apocalyptic number.

It is an amenable number.

1616633477 is a deficient number, since it is larger than the sum of its proper divisors (52149499).

1616633477 is an equidigital number, since it uses as much as digits as its factorization.

1616633477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52149498.

The product of its digits is 381024, while the sum is 44.

The square root of 1616633477 is about 40207.3808771474. The cubic root of 1616633477 is about 1173.6461792675.

The spelling of 1616633477 in words is "one billion, six hundred sixteen million, six hundred thirty-three thousand, four hundred seventy-seven".