157771903440 has 80 divisors (see below), whose sum is σ = 504870114816. Its totient is φ = 40715328000.

The previous prime is 157771903439. The next prime is 157771903559. The reversal of 157771903440 is 44309177751.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 157771903440.

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, 10595511 + ... + 10610390.

Almost surely, 2^157771903440 is an apocalyptic number.

157771903440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157771903440 is an abundant number, since it is smaller than the sum of its proper divisors (347098211376).

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

157771903440 is a wasteful number, since it uses less digits than its factorization.

157771903440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21205948 (or 21205942 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 48.

The spelling of 157771903440 in words is "one hundred fifty-seven billion, seven hundred seventy-one million, nine hundred three thousand, four hundred forty".