621261011 has 8 divisors (see below), whose sum is σ = 710709504. Its totient is φ = 531986760.

The previous prime is 621261007. The next prime is 621261019. The reversal of 621261011 is 110162126.

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

It is a cyclic number.

It is not a de Polignac number, because 621261011 - 2² = 621261007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621261019) 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, 35825 + ... + 50258.

It is an arithmetic number, because the mean of its divisors is an integer number (88838688).

Almost surely, 2^621261011 is an apocalyptic number.

621261011 is a deficient number, since it is larger than the sum of its proper divisors (89448493).

621261011 is a wasteful number, since it uses less digits than its factorization.

621261011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87121.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 621261011 is about 24925.1080438982. The cubic root of 621261011 is about 853.2796070945.

The spelling of 621261011 in words is "six hundred twenty-one million, two hundred sixty-one thousand, eleven".