1550940396380 has 48 divisors (see below), whose sum is σ = 3260784364320. Its totient is φ = 619650839808.

The previous prime is 1550940396349. The next prime is 1550940396389. The reversal of 1550940396380 is 836930490551.

It is a super-2 number, since 2×1550940396380² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550940396389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126322802 + ... + 126335078.

It is an arithmetic number, because the mean of its divisors is an integer number (67933007590).

Almost surely, 2^{1550940396380} is an apocalyptic number.

1550940396380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550940396380 is an abundant number, since it is smaller than the sum of its proper divisors (1709843967940).

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

1550940396380 is a wasteful number, since it uses less digits than its factorization.

1550940396380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19158 (or 19156 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 1550940396380 in words is "one trillion, five hundred fifty billion, nine hundred forty million, three hundred ninety-six thousand, three hundred eighty".