1621126314077 has 16 divisors (see below), whose sum is σ = 1772690209920. Its totient is φ = 1477241740800.

The previous prime is 1621126314029. The next prime is 1621126314091. The reversal of 1621126314077 is 7704136211261.

It is a cyclic number.

It is not a de Polignac number, because 1621126314077 - 2¹² = 1621126309981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621126314097) 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, 14599868 + ... + 14710485.

It is an arithmetic number, because the mean of its divisors is an integer number (110793138120).

Almost surely, 2^{1621126314077} is an apocalyptic number.

It is an amenable number.

1621126314077 is a deficient number, since it is larger than the sum of its proper divisors (151563895843).

1621126314077 is a wasteful number, since it uses less digits than its factorization.

1621126314077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29310484.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 1621126314077 in words is "one trillion, six hundred twenty-one billion, one hundred twenty-six million, three hundred fourteen thousand, seventy-seven".