157641644 has 6 divisors (see below), whose sum is σ = 275872884. Its totient is φ = 78820820.

The previous prime is 157641643. The next prime is 157641647. The reversal of 157641644 is 446146751.

It is a junction number, because it is equal to n+sod(n) for n = 157641598 and 157641607.

It is not an unprimeable number, because it can be changed into a prime (157641641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19705202 + ... + 19705209.

It is an arithmetic number, because the mean of its divisors is an integer number (45978814).

Almost surely, 2^157641644 is an apocalyptic number.

It is an amenable number.

157641644 is a deficient number, since it is larger than the sum of its proper divisors (118231240).

157641644 is a wasteful number, since it uses less digits than its factorization.

157641644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39410415 (or 39410413 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 157641644 is about 12555.5423618416. The cubic root of 157641644 is about 540.2029918135.

The spelling of 157641644 in words is "one hundred fifty-seven million, six hundred forty-one thousand, six hundred forty-four".