1551062100420 has 240 divisors, whose sum is σ = 5674333526400. Its totient is φ = 354528353088.

The previous prime is 1551062100407. The next prime is 1551062100439. The reversal of 1551062100420 is 240012601551.

1551062100420 is a `hidden beast` number, since 1 + 5 + 5 + 10 + 621 + 0 + 0 + 4 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 840034 + ... + 1951353.

It is an arithmetic number, because the mean of its divisors is an integer number (23643056360).

Almost surely, 2^{1551062100420} is an apocalyptic number.

1551062100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551062100420 is an abundant number, since it is smaller than the sum of its proper divisors (4123271425980).

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

1551062100420 is a wasteful number, since it uses less digits than its factorization.

1551062100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791429 (or 2791404 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 1551062100420 its reverse (240012601551), we get a palindrome (1791074701971).

The spelling of 1551062100420 in words is "one trillion, five hundred fifty-one billion, sixty-two million, one hundred thousand, four hundred twenty".