2157645074 has 32 divisors (see below), whose sum is σ = 3674474496. Its totient is φ = 943191360.

The previous prime is 2157645041. The next prime is 2157645079. The reversal of 2157645074 is 4705467512.

It is not an unprimeable number, because it can be changed into a prime (2157645079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9404 + ... + 66360.

It is an arithmetic number, because the mean of its divisors is an integer number (114827328).

Almost surely, 2^2157645074 is an apocalyptic number.

2157645074 is a deficient number, since it is larger than the sum of its proper divisors (1516829422).

2157645074 is a wasteful number, since it uses less digits than its factorization.

2157645074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57050.

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 2157645074 is about 46450.4582754573. The cubic root of 2157645074 is about 1292.1908715024.

The spelling of 2157645074 in words is "two billion, one hundred fifty-seven million, six hundred forty-five thousand, seventy-four".