1555796423990 has 32 divisors (see below), whose sum is σ = 2867994008640. Its totient is φ = 607478704000.

The previous prime is 1555796423939. The next prime is 1555796423999. The reversal of 1555796423990 is 993246975551.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555796423999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10776125 + ... + 10919544.

It is an arithmetic number, because the mean of its divisors is an integer number (89624812770).

Almost surely, 2^{1555796423990} is an apocalyptic number.

1555796423990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1555796423990 is a deficient number, since it is larger than the sum of its proper divisors (1312197584650).

1555796423990 is a wasteful number, since it uses less digits than its factorization.

1555796423990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21695848.

The product of its (nonzero) digits is 91854000, while the sum is 65.

The spelling of 1555796423990 in words is "one trillion, five hundred fifty-five billion, seven hundred ninety-six million, four hundred twenty-three thousand, nine hundred ninety".