157650649 has 4 divisors (see below), whose sum is σ = 169777636. Its totient is φ = 145523664.

The previous prime is 157650637. The next prime is 157650653. The reversal of 157650649 is 946056751.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10465225 + 147185424 = 3235^2 + 12132^2 .

It is not a de Polignac number, because 157650649 - 2¹⁵ = 157617881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157650659) 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, 6063474 + ... + 6063499.

It is an arithmetic number, because the mean of its divisors is an integer number (42444409).

Almost surely, 2^157650649 is an apocalyptic number.

It is an amenable number.

157650649 is a deficient number, since it is larger than the sum of its proper divisors (12126987).

157650649 is a wasteful number, since it uses less digits than its factorization.

157650649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12126986.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 157650649 is about 12555.9009632921. The cubic root of 157650649 is about 540.2132776643.

It can be divided in two parts, 1576 and 50649, that added together give a palindrome (52225).

The spelling of 157650649 in words is "one hundred fifty-seven million, six hundred fifty thousand, six hundred forty-nine".