157761987280 has 40 divisors (see below), whose sum is σ = 370578047112. Its totient is φ = 62454226944.

The previous prime is 157761987247. The next prime is 157761987293. The reversal of 157761987280 is 82789167751.

It can be written as a sum of positive squares in 4 ways, for example, as 6008110144 + 151753877136 = 77512^2 + 389556^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10157317 + ... + 10172836.

Almost surely, 2^157761987280 is an apocalyptic number.

157761987280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157761987280 is an abundant number, since it is smaller than the sum of its proper divisors (212816059832).

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

157761987280 is a wasteful number, since it uses less digits than its factorization.

157761987280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20330263 (or 20330257 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 61.

The spelling of 157761987280 in words is "one hundred fifty-seven billion, seven hundred sixty-one million, nine hundred eighty-seven thousand, two hundred eighty".