1551335423660 has 48 divisors (see below), whose sum is σ = 3614205208320. Its totient is φ = 554560578240.

The previous prime is 1551335423653. The next prime is 1551335423669. The reversal of 1551335423660 is 663245331551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (1551335423669) 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, 59745704 + ... + 59771663.

It is an arithmetic number, because the mean of its divisors is an integer number (75295941840).

Almost surely, 2^{1551335423660} is an apocalyptic number.

1551335423660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551335423660 is an abundant number, since it is smaller than the sum of its proper divisors (2062869784660).

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

1551335423660 is a wasteful number, since it uses less digits than its factorization.

1551335423660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119517446 (or 119517444 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 1551335423660 in words is "one trillion, five hundred fifty-one billion, three hundred thirty-five million, four hundred twenty-three thousand, six hundred sixty".