1611964375 has 30 divisors (see below), whose sum is σ = 2305868136. Its totient is φ = 1103526000.

The previous prime is 1611964369. The next prime is 1611964433. The reversal of 1611964375 is 5734691161.

It is not a de Polignac number, because 1611964375 - 2¹⁷ = 1611833303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2655322 + ... + 2655928.

Almost surely, 2^1611964375 is an apocalyptic number.

1611964375 is a deficient number, since it is larger than the sum of its proper divisors (693903761).

1611964375 is an frugal number, since it uses more digits than its factorization.

1611964375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 619 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 1611964375 is about 40149.2761454052. The cubic root of 1611964375 is about 1172.5151956787.

The spelling of 1611964375 in words is "one billion, six hundred eleven million, nine hundred sixty-four thousand, three hundred seventy-five".