2157654370 has 8 divisors (see below), whose sum is σ = 3883777884. Its totient is φ = 863061744.

The previous prime is 2157654349. The next prime is 2157654377. The reversal of 2157654370 is 734567512.

It can be written as a sum of positive squares in 2 ways, for example, as 1867190521 + 290463849 = 43211^2 + 17043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2157654377) 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, 107882709 + ... + 107882728.

Almost surely, 2^2157654370 is an apocalyptic number.

2157654370 is a deficient number, since it is larger than the sum of its proper divisors (1726123514).

2157654370 is a wasteful number, since it uses less digits than its factorization.

2157654370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215765444.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 2157654370 is about 46450.5583389479. The cubic root of 2157654370 is about 1292.1927272585.

The spelling of 2157654370 in words is "two billion, one hundred fifty-seven million, six hundred fifty-four thousand, three hundred seventy".