97153781506 has 8 divisors (see below), whose sum is σ = 146272422780. Its totient is φ = 48396307248.

The previous prime is 97153781489. The next prime is 97153781531. The reversal of 97153781506 is 60518735179.

It can be written as a sum of positive squares in 2 ways, for example, as 81572500881 + 15581280625 = 285609^2 + 124825^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90291081 + ... + 90292156.

Almost surely, 2^97153781506 is an apocalyptic number.

97153781506 is a deficient number, since it is larger than the sum of its proper divisors (49118641274).

97153781506 is a wasteful number, since it uses less digits than its factorization.

97153781506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180583508.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 97153781506 in words is "ninety-seven billion, one hundred fifty-three million, seven hundred eighty-one thousand, five hundred six".