1541401657 has 4 divisors (see below), whose sum is σ = 1622528080. Its totient is φ = 1460275236.

The previous prime is 1541401639. The next prime is 1541401691. The reversal of 1541401657 is 7561041451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1541401657 - 2²³ = 1533013049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1541401637) 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, 40563183 + ... + 40563220.

It is an arithmetic number, because the mean of its divisors is an integer number (405632020).

Almost surely, 2^1541401657 is an apocalyptic number.

It is an amenable number.

1541401657 is a deficient number, since it is larger than the sum of its proper divisors (81126423).

1541401657 is an equidigital number, since it uses as much as digits as its factorization.

1541401657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81126422.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 1541401657 is about 39260.6884427668. The cubic root of 1541401657 is about 1155.1505977303.

The spelling of 1541401657 in words is "one billion, five hundred forty-one million, four hundred one thousand, six hundred fifty-seven".