1621025077 has 16 divisors (see below), whose sum is σ = 1899700992. Its totient is φ = 1354193280.

The previous prime is 1621025009. The next prime is 1621025083. The reversal of 1621025077 is 7705201261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621025077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621025377) 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, 364288 + ... + 368710.

It is an arithmetic number, because the mean of its divisors is an integer number (118731312).

Almost surely, 2^1621025077 is an apocalyptic number.

It is an amenable number.

1621025077 is a deficient number, since it is larger than the sum of its proper divisors (278675915).

1621025077 is a wasteful number, since it uses less digits than its factorization.

1621025077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1621025077 is about 40261.9557026233. The cubic root of 1621025077 is about 1174.7079586864.

The spelling of 1621025077 in words is "one billion, six hundred twenty-one million, twenty-five thousand, seventy-seven".