1551798618090 has 32 divisors (see below), whose sum is σ = 4256361924480. Its totient is φ = 354696826944.

The previous prime is 1551798618079. The next prime is 1551798618127. The reversal of 1551798618090 is 908168971551.

It is a super-2 number, since 2×1551798618090² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694758405 + ... + 3694758824.

It is an arithmetic number, because the mean of its divisors is an integer number (133011310140).

Almost surely, 2^{1551798618090} is an apocalyptic number.

1551798618090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1551798618090 is an abundant number, since it is smaller than the sum of its proper divisors (2704563306390).

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

1551798618090 is a wasteful number, since it uses less digits than its factorization.

1551798618090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389517246.

The product of its (nonzero) digits is 5443200, while the sum is 60.

The spelling of 1551798618090 in words is "one trillion, five hundred fifty-one billion, seven hundred ninety-eight million, six hundred eighteen thousand, ninety".