1551281003860 has 96 divisors (see below), whose sum is σ = 3796444334592. Its totient is φ = 521488627200.

The previous prime is 1551281003851. The next prime is 1551281003911. The reversal of 1551281003860 is 683001821551.

It is a happy number.

It is a super-4 number, since 4×1551281003860⁴ (a number of 50 digits) contains 4444 as substring.

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, 923854 + ... + 1988986.

It is an arithmetic number, because the mean of its divisors is an integer number (39546295152).

Almost surely, 2^{1551281003860} is an apocalyptic number.

1551281003860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551281003860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1898222167296).

1551281003860 is an abundant number, since it is smaller than the sum of its proper divisors (2245163330732).

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

1551281003860 is a wasteful number, since it uses less digits than its factorization.

1551281003860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065353 (or 1065351 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 1551281003860 in words is "one trillion, five hundred fifty-one billion, two hundred eighty-one million, three thousand, eight hundred sixty".