123354477720 has 128 divisors (see below), whose sum is σ = 425360376000. Its totient is φ = 31760225280.

The previous prime is 123354477713. The next prime is 123354477761. The reversal of 123354477720 is 27774453321.

123354477720 is a `hidden beast` number, since 1 + 2 + 33 + 544 + 7 + 7 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1937941 + ... + 2000580.

Almost surely, 2^123354477720 is an apocalyptic number.

123354477720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123354477720 is an abundant number, since it is smaller than the sum of its proper divisors (302005898280).

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

123354477720 is a wasteful number, since it uses less digits than its factorization.

123354477720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938570 (or 3938560 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 45.

The spelling of 123354477720 in words is "one hundred twenty-three billion, three hundred fifty-four million, four hundred seventy-seven thousand, seven hundred twenty".