1551615655002 has 64 divisors (see below), whose sum is σ = 3552226272000. Its totient is φ = 442609804800.

The previous prime is 1551615655001. The next prime is 1551615655013. The reversal of 1551615655002 is 2005565161551.

It is a super-2 number, since 2×1551615655002² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1551615655001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73522252 + ... + 73543352.

It is an arithmetic number, because the mean of its divisors is an integer number (55503535500).

Almost surely, 2^{1551615655002} is an apocalyptic number.

1551615655002 is an abundant number, since it is smaller than the sum of its proper divisors (2000610616998).

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

1551615655002 is a wasteful number, since it uses less digits than its factorization.

1551615655002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23831.

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 1551615655002 in words is "one trillion, five hundred fifty-one billion, six hundred fifteen million, six hundred fifty-five thousand, two".