157217347420 has 48 divisors (see below), whose sum is σ = 399517030080. Its totient is φ = 50732319744.

The previous prime is 157217347411. The next prime is 157217347451. The reversal of 157217347420 is 24743712751.

157217347420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 33026475 + ... + 33031234.

It is an arithmetic number, because the mean of its divisors is an integer number (8323271460).

Almost surely, 2^157217347420 is an apocalyptic number.

157217347420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157217347420 is an abundant number, since it is smaller than the sum of its proper divisors (242299682660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157217347420 is a wasteful number, since it uses less digits than its factorization.

157217347420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66057742 (or 66057740 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 157217347420 in words is "one hundred fifty-seven billion, two hundred seventeen million, three hundred forty-seven thousand, four hundred twenty".