157321761784 has 64 divisors (see below), whose sum is σ = 328544087040. Its totient is φ = 70015570560.

The previous prime is 157321761761. The next prime is 157321761791. The reversal of 157321761784 is 487167123751.

157321761784 is digitally balanced in base 3, 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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236737 + ... + 2305999.

It is an arithmetic number, because the mean of its divisors is an integer number (5133501360).

Almost surely, 2^157321761784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157321761784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164272043520).

157321761784 is an abundant number, since it is smaller than the sum of its proper divisors (171222325256).

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

157321761784 is a wasteful number, since it uses less digits than its factorization.

157321761784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69820 (or 69816 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 52.

The spelling of 157321761784 in words is "one hundred fifty-seven billion, three hundred twenty-one million, seven hundred sixty-one thousand, seven hundred eighty-four".