1621615606151 has 8 divisors (see below), whose sum is σ = 1717286299344. Its totient is φ = 1525976195200.

The previous prime is 1621615606111. The next prime is 1621615606157. The reversal of 1621615606151 is 1516065161261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1621615606151 - 2¹⁴ = 1621615589767 is a prime.

It is a super-2 number, since 2×1621615606151² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621615606099 and 1621615606108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621615606157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7713785 + ... + 7921218.

It is an arithmetic number, because the mean of its divisors is an integer number (214660787418).

Almost surely, 2^{1621615606151} is an apocalyptic number.

1621615606151 is a deficient number, since it is larger than the sum of its proper divisors (95670693193).

1621615606151 is a wasteful number, since it uses less digits than its factorization.

1621615606151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15641121.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 1621615606151 in words is "one trillion, six hundred twenty-one billion, six hundred fifteen million, six hundred six thousand, one hundred fifty-one".