1621130771377 has 8 divisors (see below), whose sum is σ = 1747260656064. Its totient is φ = 1495204817808.

The previous prime is 1621130771369. The next prime is 1621130771383. The reversal of 1621130771377 is 7731770311261.

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

It is not a de Polignac number, because 1621130771377 - 2³ = 1621130771369 is a prime.

It is a super-2 number, since 2×1621130771377² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621130771357) 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, 50966263 + ... + 50998060.

It is an arithmetic number, because the mean of its divisors is an integer number (218407582008).

Almost surely, 2^{1621130771377} is an apocalyptic number.

It is an amenable number.

1621130771377 is a deficient number, since it is larger than the sum of its proper divisors (126129884687).

1621130771377 is a wasteful number, since it uses less digits than its factorization.

1621130771377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101965559.

The product of its (nonzero) digits is 259308, while the sum is 46.

The spelling of 1621130771377 in words is "one trillion, six hundred twenty-one billion, one hundred thirty million, seven hundred seventy-one thousand, three hundred seventy-seven".