61650701257621 has 16 divisors (see below), whose sum is σ = 71509957259904. Its totient is φ = 52054457361984.

The previous prime is 61650701257573. The next prime is 61650701257669. The reversal of 61650701257621 is 12675210705616.

It is an interprime number because it is at equal distance from previous prime (61650701257573) and next prime (61650701257669).

It is not a de Polignac number, because 61650701257621 - 2¹⁷ = 61650701126549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650701257681) 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, 139942131 + ... + 140381983.

It is an arithmetic number, because the mean of its divisors is an integer number (4469372328744).

Almost surely, 2^{61650701257621} is an apocalyptic number.

It is an amenable number.

61650701257621 is a deficient number, since it is larger than the sum of its proper divisors (9859256002283).

61650701257621 is a wasteful number, since it uses less digits than its factorization.

61650701257621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738780.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 61650701257621 in words is "sixty-one trillion, six hundred fifty billion, seven hundred one million, two hundred fifty-seven thousand, six hundred twenty-one".