1657552641 has 8 divisors (see below), whose sum is σ = 2238046080. Its totient is φ = 1091047152.

The previous prime is 1657552601. The next prime is 1657552651. The reversal of 1657552641 is 1462557561.

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

It is not a de Polignac number, because 1657552641 - 2⁶ = 1657552577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1657552593 and 1657552602.

It is not an unprimeable number, because it can be changed into a prime (1657552601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3496710 + ... + 3497183.

It is an arithmetic number, because the mean of its divisors is an integer number (279755760).

Almost surely, 2^1657552641 is an apocalyptic number.

It is an amenable number.

1657552641 is a deficient number, since it is larger than the sum of its proper divisors (580493439).

1657552641 is an equidigital number, since it uses as much as digits as its factorization.

1657552641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993975.

The product of its digits is 252000, while the sum is 42.

The square root of 1657552641 is about 40713.0524647809. The cubic root of 1657552641 is about 1183.4659756270.

The spelling of 1657552641 in words is "one billion, six hundred fifty-seven million, five hundred fifty-two thousand, six hundred forty-one".