61621626 has 32 divisors (see below), whose sum is σ = 134742528. Its totient is φ = 18632240.

The previous prime is 61621603. The next prime is 61621627. The reversal of 61621626 is 62612616.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 61621593 and 61621602.

It is not an unprimeable number, because it can be changed into a prime (61621627) 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, 44395 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (4210704).

Almost surely, 2^61621626 is an apocalyptic number.

61621626 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

61621626 is an abundant number, since it is smaller than the sum of its proper divisors (73120902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61621626 is a wasteful number, since it uses less digits than its factorization.

61621626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066.

The product of its digits is 5184, while the sum is 30.

The square root of 61621626 is about 7849.9443310128. The cubic root of 61621626 is about 394.9823759695.

The spelling of 61621626 in words is "sixty-one million, six hundred twenty-one thousand, six hundred twenty-six".