1541400646 has 4 divisors (see below), whose sum is σ = 2312100972. Its totient is φ = 770700322.

The previous prime is 1541400613. The next prime is 1541400647. The reversal of 1541400646 is 6460041451.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541400647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385350160 + ... + 385350163.

It is an arithmetic number, because the mean of its divisors is an integer number (578025243).

Almost surely, 2^1541400646 is an apocalyptic number.

1541400646 is a deficient number, since it is larger than the sum of its proper divisors (770700326).

1541400646 is an equidigital number, since it uses as much as digits as its factorization.

1541400646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770700325.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1541400646 is about 39260.6755672900. The cubic root of 1541400646 is about 1155.1503451772.

The spelling of 1541400646 in words is "one billion, five hundred forty-one million, four hundred thousand, six hundred forty-six".