157724451440 has 40 divisors (see below), whose sum is σ = 375653487888. Its totient is φ = 61551004160.

The previous prime is 157724451439. The next prime is 157724451449. The reversal of 157724451440 is 44154427751.

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

It is a junction number, because it is equal to n+sod(n) for n = 157724451391 and 157724451400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157724451449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24040082 + ... + 24046641.

Almost surely, 2^157724451440 is an apocalyptic number.

157724451440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157724451440 is an abundant number, since it is smaller than the sum of its proper divisors (217929036448).

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

157724451440 is a wasteful number, since it uses less digits than its factorization.

157724451440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48086777 (or 48086771 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 157724451440 in words is "one hundred fifty-seven billion, seven hundred twenty-four million, four hundred fifty-one thousand, four hundred forty".