1616651451 has 24 divisors (see below), whose sum is σ = 2365912224. Its totient is φ = 1063670400.

The previous prime is 1616651419. The next prime is 1616651459. The reversal of 1616651451 is 1541566161.

It is not a de Polignac number, because 1616651451 - 2⁵ = 1616651419 is a prime.

It is a super-2 number, since 2×1616651451² = 5227123828040810802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616651459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209575 + ... + 217151.

It is an arithmetic number, because the mean of its divisors is an integer number (98579676).

Almost surely, 2^1616651451 is an apocalyptic number.

1616651451 is a deficient number, since it is larger than the sum of its proper divisors (749260773).

1616651451 is a wasteful number, since it uses less digits than its factorization.

1616651451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891 (or 7888 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1616651451 is about 40207.6043927016. The cubic root of 1616651451 is about 1173.6505288492.

The spelling of 1616651451 in words is "one billion, six hundred sixteen million, six hundred fifty-one thousand, four hundred fifty-one".